When the index card is quickly pulled away from the glass in a horizontal direction, why does the disk fall straight down into the glass?
a. kinetic friction
b. inertia
c. static friction
d. equilibrium
Answers
The disk falls straight down into the glass due to inertia. Therefore, option (B) is correct.
What is the Law of Inertia?The Law of inertia can be described as an object will continue to be in a state of rest or in motion unless an external force applies to it. All objects will come to rest and moving objects will continue to move in the absence of external power.
When the resistance is given by the body to continue to be in motion until an external force applies to it. Inertia s the reason the body to continue the motion in the same direction in the absence of external force. Inertia depends on density and mass, not on velocity.
When the index card is quickly pulled from the glass in a horizontal direction, the disk falls straight down into the glass as the disk tries to stay at rest due to inertia.
Learn more about Inertia, here:
brainly.com/question/3268780
#SPJ1
Related Questions
The height of the empire tate building i 318. 00 meter. If a tone i dropped from the top of the building ,what i the tone' velocity jut before it trike the ground?
Answers
Use the equation v = v0 + gt = 0 + 9.80665 * 8 to find the final free fall speed (right before impact with the ground), which is 78.45 m/s.
To determine the velocity at impact, multiply the time by the acceleration caused by gravity. If the object hits the ground after 9.9 seconds, its velocity is
=(1.01 s)*(9.8 m/s2),
=9.9 m/s.
Initial velocity plus two times the acceleration times the distance equals final velocity. V is the speed right before collision. Initial velocity, or u, is 0 mph.
Gravity's acceleration, a, is 9.81 m/s/s.
Therefore, from the moment the projectile is thrown, through its highest point, and until just before it hits the ground, its acceleration is equal to the acceleration caused by gravity, or 9.81 meters per second per second.
Learn more about velocity here-
https://brainly.com/question/18084516
#SPJ4
a 1140-kg van, stopped at a traffic light, is hit directly in the rear by a 745-kg car traveling with a velocity of 1.77 m/s. assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. what is the final velocity of (a) the car and (b) the van?
Answers
Applying the conservation of momentum law we find the final velocity of
a) the car = 0.37 m/s in the opposite direction.
b) the van = 1.39 m/s
Define elastic collision between particles?
An elastic collision is defined as the collision which when happens between bodies there is no net loss of kinetic energy in the system. In elastic collisions, both kinetic energy and momentum of the bodies are conserved.The given informations in the question are-
Mass of van = mv = 1140 kg
Mass of car = mc = 745 kg
Initial velocity of car = v1_i = 2.25 m/s
Applying conservation of momentum, the final velocity of the car is found out using the formula,
v1_f = (mc - mv) x v1_i / (mc + mv)
Putting the values we get,
v1_f = (745 - 1140) x 1.77 / (745 + 1140)
= - 395 x 1.77 / 1885
= - 0.37 m/s
The negative sign indicates that after collision it is moving in the opposite direction to its initial speed.
The final velocity of the van, is found out using the formula,
v2_f = 2 x mc x v1_i / (mv +mc)
Putting the values we get,
v2_f = 2 x 745 x 1.77 / (745 + 1140)
= 1.39 m/s
Hence, the final velocity of
a) the car = 0.37 m/s in the opposite direction.
b) the van = 1.39 m/s
To learn more about elastic collision from the given link
https://brainly.com/question/2356572
#SPJ4
Where loads are likely to be ON for 4 hours, the computed load for sizing branch-circuit conductors and OCPDs must be calculated by multiplying the actual load current times ___.
Answers
We have to multiply the actual load current times by 1.25 (2017 NEC: 210.20(A)).
NEC 210.20(A) Continuous and Noncontinuous Loads:
The rating of the overcurrent device must be no less than the noncontinuous load plus 125 percent of the continuous load when a branch circuit delivers continuous loads or any combination of continuous and noncontinuous loads.
With one exception, the ampere rating of the overcurrent device may not be less than the total of the continuous load and the noncontinuous load when the assembly, including the overcurrent devices safeguarding the branch circuit(s), is rated for operation at 100% of its rating.
To learn more about this, have a look at this example:
https://brainly.com/question/29095477
#SPJ4
A cart has a net horizontal force acting on it to the right Jon says taht it must be moving to the right. jonne says no, it could be moving in either direction. Are either of these two correct? If so, explained and described the velocity and acceleration if any of the cart
Answers
Since the net force acts towards the right, the object would move towards the right and the acceleration would also be towards the right.
What is the net force?The term net force has to do with the actual force that acts on a body. We know that a force is a vector quantity and that a system of forces could act on an object.
When more than one force is acting on an object, it then follows that the object would remain at rest or in a state of uniform motion if the forces are balanced.
If the forces are not balanced, the object would move in the direction of the net force that acts on the body.
Learn more about net force:https://brainly.com/question/18109210
#SPJ1
in the process of delivering mail, a postal worker walks 161 m, due east from his truck. he then turns around and walks 194 m, due west from his truck. what is the worker's displacement relative to his truck?
Answers
33 m, due west, is the worker's displacement from his truck.
The meaning of displacementThe state of being displaced: the action or process of displacing. a storm that forced thousands of people to evacuate. Physics: the volume and weight of a fluid, such as water, that is moved by a floating object, such as a ship, of equivalent weight (see move sense 2a).
What else can displacement be called?Replace, supersede, & supplant are some typical synonyms for the word "displace." Displace indicates an ousting and dislodging even if all of these terms imply "to put out of a customary or proper place and into the position of another." Thousands had been displaced by war.
To know more about Displacement visit:
https://brainly.com/question/11934397
#SPJ4
an astronomer states that star p has a lower absolute brightness than star q. how would you translate this observation for a non-scientist? a star p is shinier than star q. b star q gives off more light than star p. c stars p and q are the same brightness but different distances from earth. d star p is much closer than star q.
Answers
An astronomer states that star p has a lower absolute brightness than star q. Option B. b star q gives off more light than star p.
According to astronomers Stars have a wide variety of obvious brightness measured right here on this planet. The version of their brightness is resulting from both versions of their luminosity and versions of their distance.
The plain brightness of a star is proportional to one divided by means of its distance squared. that is, if you took a star and moved it twice as some distance away, it might appear 1/4 as bright; in case you moved it four times the distance, it'd appear 1/sixteen as brilliant.
Apparent value is the brightness of a celeb because it seems to the observer. this is what stargazers look at after they take a look at the sky and notice that a few stars are brighter than others. Absolute significance is the brightness of a star from a distance of 10 parsecs away
Learn more about astronomers here:-https://brainly.com/question/1003405
#SPJ4
What particle determines how an atom bond
Answers
If Usain Bolt runs at a speed of 12 m/s for 100 seconds, how far did Usain Bolt run in meters
Answers
The distance covered by Usain Bolt in meters is 1200 meter.
Speed is defined as the distance travelled or covered in a particular time period. Speed is a scalar quantity as it does not specify the direction of motion, whereas velocity is the vector counterpart of speed as velocity specifies the direction of motion of the object or body or anything concerned with the motion.
Speed is given by the equation,
speed= distance traveled/time taken --- equation(1)
so we can calculate distance from equation(1) as ,
distance traveled= speed × time taken --- equation(2)
here,
speed is given as 12 m/s and time taken is given as 100 seconds
Therefore from equation(2)
distance traveled = 12m/s×100s=1200m
that is , the distance covered by Usain Bolt is 1200 meters.
To know more about speed
https://brainly.com/question/29336964
#SPJ1
the relative velocity of two cars is 50m/s when they move in opposite direction and 10m/s when they move in same direction. what is the speed of each car
Answers
The speed of the each of the car moving in the same direction with a relative velocity of 50 m/s is 30 m/s and 20 m/s respectively.
What is relative velocity?The relative velocity is defined as the velocity of an object with respect to another observer.
For both cars moving in the opposite direction,
R = Va+Vb.............. Equation 1Where:
R = Relative velocityVa = Velocity of the first carVb = Velocity of the second carFrom the question,
Given:
R = 50 m/sSubstitute into equation 1
50 = Va+Vb................ Equation 2Also, for both cars traveling in the same direction
R = Va-Vb.............. Equation 3Given:
R = 10 m/sSubstitute into equation 3
10 = Va-Vb............ Equation 4Solve equation 2 and 4 simultaneously,
Adding equation 2 and equation 4
50+10 = Va+Va+Vb-Vb60 = 2VaVa = 60/2Va = 30 m/sSubstituting the value of Va into equation 1
50 = 30+VbVb = 50-30Vb = 20 m/sHence, the speed of each car is 30 m/s and 20 m/s respectively.
Learn more about relative velocity here: https://brainly.com/question/13363067
#SPJ1
you are the first astronaut to land on planet x. unfortunately you packed light, so all you have available is a pendulum (a mass attached to a string), as well as a stopwatch and a ruler. explain how you would measure the acceleration due to gravity on planet x.
Answers
Acceleration due to gravity states that when an object falls freely towards the surface of earth from a certain height, then there is a change in velocity which produces acceleration in the object which is known as acceleration due to gravity denoted by g.
The value of acceleration due to gravity is. g=9. 8m/s2.
How do you measure Acceleration due to gravity on planet X?
The given is a planet " X "The light is packedA pendulum is available with attached massa ruler is there like a metre scale and a stopwatchNeed to find the acceleration due to gravity on planet " X "Using equation T = 2 \pi ( L / g )1/2 T2 = 4 \pi2 ( L / g )g = 4 \pi2 L / T2 ------------------- 1Here we have a pendulum so using ruler we can measure the length = L and using pendulum's SHM trials count by stopwatch we can get time period " T " as whole we have here two quantities like L and T
Substituting in equation " 1 " we can find the gravity of the planet " X ".
To know more about Acceleration due to gravity from the given link
https://brainly.com/question/25876659
#SPJ4
a glider of mass 4.0 kg is placed on a horizontal air track and connected by a light, inextensible string over a frictionless pulley to a hanging 1.0 kg mass, both starting from rest. how long does it take the 1.0 kg mass to fall 1.0 m? (take g
Answers
It will take the 1.0 kg mass to fall 1.0 m is about 3.83seconds.
What does physics define as a force?The push or pull on a massed object alters its velocity, which is the definition of force. An agent with the ability to change a body's resting or moving state is known as an external force. It has a magnitude and a direction.
Finding the force the rope in this situation applied to the 3 kg weight should be our first step.
Weight of 4kg mass = 4×9.8 = 39.2
Weight of 1kg mass = 1×9.8 = 9.8
The force acting upward on the 4kg mass will equal the weight of the 1kg mass. Thus the resultant force acting on the 4kg mass is:
Total force = 39.2 - 9.8 = 29.4 N (upwards)
Now find the acceleration:
F = m×a
29.4= 1×a
a = 29.4m/s²
We now apply the motion equation shown below to determine how long it takes to move one meter:
s = u × t + 1/2(a × t²)
1 = 0 × t +1/2(29.4 × t²)
t = 3.83seconds.
To know more about force visit:
https://brainly.com/question/15143403
#SPJ4
a man holds a 1.00-kg box above his head for 2 minutes. the work done by the man during these 2 minutes is
Answers
The work done by the man during these 2 minutes is zero.
What is work?A force must be applied in order to produce work, and there must also be motion or displacement in the force's direction. The amount of work performed by a force acting on an item is equal to the force's magnitude times the distance travelled in the force's direction. Work has only magnitude and no direction. As a result, work is a scalar quantity.
According to the question, a man holds a 1.00-kg box above his head for 2 minutes. No displacement happens in this two minutes. So, no work is done by the man.
Learn more about work here:
https://brainly.com/question/19382352
#SPJ1
If you have an 18 Ohm light bulb connected to a 9. 0 V cell, what i the current in the circuit?
Answers
The current in the circuit is 0.5 A
what is current?
An electrical charge carrier flow known as current often involves electrons or atoms lacking in electrons. The capital letter I is a typical way to represent current.
I = V/R
I = 9/18
I = 0.5 A
Therefore, the current in the circuit is 0.5
To, learn more about current
here: https://brainly.com/question/
#SPJ4
The circuit's current is 0.5 A.
What is current?
An electric current is a flow of charged particles, such as electrons or ions, across a conductor or space. It is calculated as the net rate of charge flow through a surface or into a control volume. Charge carriers are moving particles that can be one of numerous sorts depending on the conductor. Electrons flowing over a wire are frequently used as charge carriers in electric circuits. They can be either electrons or holes in semiconductors. Ions are the charge carriers in an electrolyte, whereas ions and electrons are the charge carriers in plasma, an ionised gas.
I = V/R
I = 9/18
I = 0.5 A
Therefore, the current in the circuit is 0.5
To, learn more about current
https://brainly.com/question/25922783
#SPJ4
Explain how each of the three types of energy transfer occurs in the oven as the soup is cooked.
Answers
The three types of energy transfer occurs in the oven as the soup is cooked is mentioned above.
There are three types of thermal energy transfer. They are:
ConductionConvectionRadiationConduction is the heat transfer through physical touch. Convection is the heat transfer between fluid objects. Radiation is the transfer of heat energy by means of waves.
When the soup is cooked in the oven,
Conduction - When heat is transferred from utensil to soupConvection - When heat is transferred from lower layer of soup to other layers of soup Radiation - The oven provided heat energy by means of radiationTherefore, the three types of energy transfer occurs in the oven as the soup is cooked is mentioned above.
To know more about three types of energy transfer
https://brainly.com/question/18326751
#SPJ4
4. for the circuit in fig. 21.53: 1. find the value of l in millihenries if the resonant frequency is 1800 hz. 2. calculate xl and xc how do they compare? 3. find the magnitude of the current i rms at resonance. 4. find the power dissipated by the circuit at resonance. 5. what is the apparent power delivered to the system at resonance? 6. what is the power factor of the circuit at resonance? 7. calculate the q of the circuit and the resulting bandwidth. 8. find the cutoff frequencies, and calculate the power dissipated by the circuit at these frequencies.
Answers
i just did the test, the answer might change
throughout the years
HELP PHYSICS 100PTS!!!
Two uniform disks with the same mass are
connected by a light inextensible string sup-
ported by a massless pulley on a frictionless
axis. The string is attached to a point on the
circumference of disk A (on the left) and is
wound around disk B (on the right) so that
the disk will rotate like a yo-yo when dropped.
Answers
the answer is WE GO DOWN 89W8 >#*#,'
In addition to starch, plants also convert glucose into cellulose. Cellulose is used
to support and strengthen plants. Animals do not have cellulose for support.
Instead, animals have something else to provide support and protect the body.
Do you remember what this is?
Answers
Additionally, the conversion of glucose results in the creation of other chemical components that support the growth and reproduction of the plant.
What is Cellulose?A polysaccharide or complicated carbohydrate with at least 3,000 glucose molecules per gram, cellulose. The most prevalent of all naturally occurring organic substances, cellulose is the basic structural element of plant cell walls and compensates around 33% of all vegetable matter.
Despite not being able to be digested by humans, cellulose is a food supply for grazing animals because they can keep this in their digestive tracts long enough even for protozoans, which are found in the guts of insects like termite, to digest it.
To know more about Cellulose:
https://brainly.com/question/2662860
#SPJ1
a boy on board a cruise ship drops a 30.0-g marble into the ocean. if the resistive force proportionality constant is 0.500 kg/s, what is the terminal speed of the marble in m/s?
Answers
The terminal speed of the marble is 0.588 m/s.
What is speed ?"Speed" is a common name for a variety of stimulants used by teens, young adults, and others to make them more alert, focused, and sometimes uplifting. Some people use different speeds to curb their appetite.Velocity is the percentage of time an object moves along a path, and Velocity is the speed and direction of an object's movement.Speed is the street name for amphetamine sulfate, but it is sometimes used to refer to other amphetamines.It is usually an off-white or pink marble that can also appear as crystals. Some are pasty, usually white/grey or brown, and can be moist and gritty.To learn more about speed from the given link :
https://brainly.com/question/28224010
#SPJ4
5. Distance covered by a moving body is always greater than 0.
Displacement of a particle can be >,< or=0
a.Both assertions and reason are correct, reason is the the correct explanation
b. Both assertions and reason are correct; reason isn't the correct explanation of the assertion.
c. Assertion is correct but reason isn't
d Assertion is not correct but reason is
Answers
Answer:
Explanation:
c. Assertion is correct but reason isn't
a weather balloon is floating at a constant height above earth when it releases a pack of instruments. if the pack hits the ground with a velocity of -76.5 m/s what is the packs displacement? how long does the pack fall?
Answers
Answer:
below
Explanation:
vf = 76.5
vf= at
76.5 = 9.81 t shows t = 7.798 s
d = 1/2 a t^2 = 1/2 ( 9.81)(7.798)^2 = 298.3 m
point p is 5 cm above the wire as you look straight down at it. in which direction is the magnetic field at p?
Answers
Answer:
If you wrap your right hand around the wire with your thumb in the direction of the conventional current (+ to -), your fingers will point in the direction of the magnetic field.
Note - The conventional current goes from a battery's plus terminal to its negative terminal in the external circuit. (the actual direction of the electrons travel from - to + in the external circuit)
A 950 kg truck accelerates from rest to 15 m/s in 2. 3 seconds as it drives down a rough road. If the forward force of the engine is 7000 newtons determine the force of friction between the tires and the road? express your answer in newtons.
Answers
Because friction always opposes motion, according to Newton's second law of motion, F f 804 N.
What is the example of friction?Vehicle operation on a surface- When a truck is being driven, the engine exerts a force on the wheel that propels the vehicle forward. The vehicle can't move ahead because of the friction between both the wheels as well as the ground. Consequently, the car keeps from skidding.
What avoids rubbing?The resistance between the surfaces can be decreased by using lubricants like oil or grease. Friction can be decreased by polishing its surface, which makes it smooth.
To know more about Fictions visit:
https://brainly.com/question/23367681
#SPJ4
a spring with a spring constant of 8.0 n/m is initially compressed to 5.0 cm. the work done as it is compressed another 15 cm, to a total compression of 20 cm is: a. 0.85 j. b. 0.54 j. c. 0.25 j. d. 0.15 j. e. 0.09 j.
Answers
When a spring with an initial compression of 5.0 cm is compressed by 0.15, a total compressed of 20 cm is achieved. as it is compressed another 15 cm, the work is completed. spring constant 8.0 n/m
The spring constant can be calculated using the spring constant. Springs that are more rigid are more likely to be challenging to stretch. Elastic substances make up springs. spring constant deforms when external forces are applied, but it returns to its original position once the force is removed. A linear elastic deformation has occurred with the spring. The relationship curve between force and displacement is linear.
A type of compressed spring that generates linear force is the spring.
Work completed, w = 0.5 k x - 0.5 ky
W= 1/2K (x^2 - y^2 )
W = 1/2 ( 8 ) / (20 * 10^ -2 ) ^2 - ( 5* 10 ^-2 ) ^2 J
W = 0.15 J
Learn more about spring constant here
https://brainly.com/question/14670501
#SPJ4
what is the range of frequency that the 3 db point occurs in? group of answer choices 0 to 10 hz 10 to 100 hz 100 to 1000 hz 1000 to 10000
Answers
The correct option is 10 to 100 Hz. A low pass and high pass filter are cascaded to create a band pass filter. It has two reactive elements, making it a second order filter.
The signal strength to frequency graph looks like this because this filter favors high frequencies: We may do a variety of signal processing operations using the low-pass and high-pass filters, including picking out a certain frequency band. We can easily sketch the perfect filter response since the -3dB point is also quite near to the place where the "unity gain" line and the asymptote for the filter's roll-off curve intersect.
Drawing piecewise-linear approximations for filter performance is no longer necessary in modern times thanks to the usage of computers, but this was not the case when electrical circuit design and analysis first started. Even with the introduction of electronic calculators, the majority of these activities were still done by hand.
Learn more about frequency here-
https://brainly.com/question/2140860
#SPJ4
Classify the disadvantages of unconventional oil and gas extraction as belonging to ei sands mining. ther hydraulic fracturing or tar Hydraulic fracturing Tar sands mining Answer Bank local groundwater contamination huge lakes of acidic and toxic wastewater Output outpaces transportation capacity requires heated pipelines for transport destroys habitat and pollutes watersheds corporate rights to oil and gas on private property The breakeven price is S60 per barrel. ye more greenhouse gas emissions Wastewater in injection wells triggers earthquakes.
Answers
The disadvantages of unconventional oil and gas extraction as belonging to tar sands mining are as follows:-
Oil and gas extraction:-
Local groundwater contaminationCorporate rights to oil and gas on private propertyWaste water in injection wells triggers earthquakesOutput outpaces transportationsTar sand mining:-
20% more greenhouse gas emissionRequires heated pipelines for transportHuge lakes of acidic and toxic waste waterDestroys habitat and pollutes watershedsLearn more about gas extraction here:- https://brainly.com/question/1990340
#SPJ4
Disclaimer:- your question is incomplete, please see below for the complete question.
Classify the disadvantages of unconventional oil and gas extraction as belonging to ei sands mining.
a. ther hydraulic fracturing or tar Hydraulic fracturing Tar sands.
b. mining Answer Bank local groundwater contamination huge lakes of acidic and toxic.
C. wastewater Output outpaces transportation capacity requires heated pipelines for transport destroys habitat and pollutes watersheds corporate rights to oil and gas on private property
D.The breakeven price is S60 per barrel. ye more greenhouse gas emissions Wastewater in injection wells triggers earthquakes
if the race car has wings which increase the downward force by 4000 n, what is the maximum braking force?
Answers
The maximum braking force that can be applied to the car having a mass of 500kg is 8820 N
F= μN ( μ= Coefficient of static friction and N= max normal reaction of the car)
= 1.8 X 500g= 1.8 X 500 X 9.8= 8820 N
Alternatively known as brake power, the braking force describes the total amount of force applied to a moving body that causes it to slow down or come to a stop. Breaking force is the minimum force, expressed in pounds, at which a chain, wire cable, webbing strap, or end device breaks when a continuously increasing force is applied to it. For this force to be calculated correctly, the vehicle's body must be moving at a known, constant speed. If the car's wheels are still turning while it is braking, static friction is at work; however, if the wheels are locked and sliding over the road, kinetic friction is at work. The breaking stress or ultimate tensile stress is the highest amount of stress a material can withstand before breaking.
Learn more about braking force here:
https://brainly.com/question/28966720
#SPJ4
Candace is a goalie on her hockey team who has a reputation for stopping every puck before it enters the goal. Which skill most likely helps candace respond as the puck flies in her direction?.
Answers
Reaction time is the skill that mostly helps candace respond as the puck flies in her direction
Reaction time (RT) is a measure of the quickness with which a person responds to some sort of stimulus. It is defined as the interval of time between the stimulus and voluntary response in the subject.
Her reaction time is really quick , She reacts quickly to the different areas that the puck is going and is able to go across the crease to stop it
To learn more about reaction time here :
https://brainly.com/question/13693578
#SPJ4
A car accelerates from an initial velocity of vi=20 m/s to a final velocity of bc=35 m/s in a time interval of 5 s find avarage acceleration
Answers
Answer:
Average acceleration of the car = 3 m/s²
Explanation:
According to the question,
Initial velocity of the car ([tex] \rm v_i [/tex]) = 20 m/s
Final velocity of the car ([tex] \rm v_f [/tex]) = 35 m/s
Time interval of uniform acceleration (t) = 5 s
By using [tex] 1^{st} [/tex] kinematic equation and substituting value we get:
[tex] \rm \implies v_f = v_i + at \\ \\ \rm \implies at = v_f - v_i \\ \\ \rm \implies a = \dfrac{v_f - v_i }{t} \\ \\ \rm \implies a = \dfrac{35 - 20 }{5} \\ \\ \rm \implies a = \frac{15}{5} \\ \\ \rm \implies a = 3 \: m {s}^{ - 2} [/tex]
[tex] \therefore [/tex]
Average acceleration of the car is 3 m/s²
Fill in the blank question.
Your sibling drops your house keys down to you from the second-floor window, as shown in the image. What is the velocity of the keys when you catch them?
Answers
What are the two key observational facts that led to widespread acceptance of the big bang model?.
Answers
The two key pieces of evidence that support the Big Bang theory are the cosmic background radiation and the observed helium content of the universe.
What is the Big Bang?
The big bang explains the way the universe began. It states that the universe began as just a single point, then expanded and stretched to grow as large as it is right now. The term “Big Bang” was coined by the British astronomer Fred Hoyle in 1949. Around 13.7 billion years ago, everything condensed in an infinitesimally small singularity, a point of infinite denseness and heat. Cosmic microwave background is the electromagnetic radiation which fills the universe that is a residual effect of the big bang 13.8 billion years ago.
The presence of hydrogen and helium helps scientists to universal expansion rate.
To know more about Big bang from the given link
https://brainly.com/question/17209127
#SPJ4