Answer:
Balanced
Explanation:
If a stationary object is staying still (in this case it's the ball) all of the forces acting upon it are balanced. If an object moving has balanced forces, it would move in the same direction at the same speed until a different outside force interrupts the equilibrium.
Hope this helps :)
This question involves the concepts of Newton's Second Law and Balanced Force.
The forces acting upon the ball are "Balanced".
Newton's Second LawAccording to Newton's Second Law whenever an unbalanced force is applied on an object, it produces an acceleration in the object in the direction of the force itself. This acceleration is directly proportional to the magnitude of the force and inversely proportional to the mass of the object.
Since, the ball is at rest and not moving. Hence, it has no acceleration and no unbalanced force is applied on it. The weight of the ball is balanced by the normal reaction provided by the table. Therefore, the forces acting on the ball are Balanced Forces.
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You are in a car moving at 50 mph to the right, from the reference frame of the ground. A truck is next to you moving at 30 mph to the right, also from the reference frame of the ground. Which is true from your reference frame of the car?
a. The truck would appear to stand still.This answer is incorrect.
b. The truck would appear to be moving forward.
c. The truck would appear to be moving backward.
Spring A has a spring constant of 5 N/m and spring B has a force constant of 9 N/m. A weight of 2 kg is applied to spring A and a weight of 10 kg is applied to spring B. Which of the following is true for the final displacements of springs A and B?
a) Spring B has a larger displacement than spring A. b) Spring A has a larger displacement than spring B. c) Spring A and spring B have the same displacement.
Answer: Option A.
Spring B has a larger displacement that spring A.
Explanation:
Spring B has a larger displacement that spring A .
By using Hooke's law.
F=-Kx
Where F is force, K is spring constant and x is displacement.
For spring a
Weight / force is 2 kg
Spring constant (K) is 5/nm
Therefore,
F=-Kx
2=-5x
X=2/-5
X= -0.4m
For spring B.
Weight is 10Kg
Spring constant is 9N/m
F=-Kx
10=-9x
X=-10/9
=-1.1m
Therefore Spring B have larger displacement than spring A.
In Hooke's law, negative sign that is present on the spring's force indicate that the force exerted by the spring opposes the spring's displacement.
Chlorine has 17 electrons. According to the modern atomic theory, how many electrons are found in n = 2?
Answer:
8 electrons
Explanation:
According to the modern atomic theory, the electronic configuration of chlorine (e⁻ = 17, Z = 17) is:
1 s² → 2 electrons
2 s² 2 p⁶ → 8 electrons
3 s² 3 p⁵ → 7 electrons
Total: 17 electrons
In n = 1 chlorine has 2 electrons, in n = 2 chlorine has 8 electrons and in n = 3 it has 7 electrons.
Therefore, in n = 2 chlorine has 8 electrons (2 from s orbital and 6 from p orbital).
I hope it helps you!
If you travel 10 miles, how many kilometers are traveling
Answer:
16.0934
Explanation:
Miles to kilometers
PLEASE HELP AND HURRRRY
A package is dropped from a plane flying at a constant speed. Neglecting air resistance, when the package hits the ground the horizontal location of the plane will....
A. Be behind the package
B. Depend on speed of package
C. Be directly over the package
D. Be in front of the package
Answer:
A. Be behind the package
In february a little town received snow on a daily basis. The first day they had 10 inches, 3 inches the second, 7 inches the 3rd, and 4 inches on the fourth day. What was the average snowfall?
Answer:
The average is 6
Explanation:
To find the average, you have to first add all the numbers. After you add all the numbers up, then you divide by how many numbers there are. This one had 4 numbers so you divide by 4
The average snowfall of the four days was 6 inches.
What is snow?
When atmospheric water vapor freeze into small ice crystals and falling in small white flakes or lying on the ground as a white layer, it is called snow.
In the question it is said that,
Amount of snow received by the town on first day = 10 inches.
Amount of snow received by the town on second day = 3 inches.
Amount of snow received by the town on third day = 7 inches.
Amount of snow received by the town on fourth day = 4 inches.
Total amount of snow received by the town on these four days = ( 10 + 3+ 7 + 4) inches.
=24 inches.
Hence, average amount of snow received by the town on these four days = total amount of snow received ÷ 4
= ( 24 ÷ 4) inches.
= 6 inches.
Hence, the average snow received by the little town was 6 inches on those days.
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a nucleus with four protons have a total positive charge of what
Answer:
The name of element is Beryllium.
Explanation:
Given that,
A nucleus with four protons have a total positive charge.
Suppose, what is the name of element ?
We know that,
The name of element which have 4 positive charge is Beryllium.
Beryllium is a element which is symbol is Be.
Atomic number of beryllium is 4 and atomic mass is 9.
The number of neutrons are 5.
Hence, The name of element is Beryllium.
an antonym of lithium (Li) forms and an iconic bond with atom of chlorine CI to form lithium chloride. how are the valence electrons of these atoms rearranged to form this Bond ?
Li , which is located in group 1 of the periodic table, has one valence electron.
Chlorine, which is in group 17 of the periodic table, has seven valence electrons.
When the two atoms bond, lithium will lose one electron and form the lithium cation, Li + .
Since it loses one electron 7-1 = 6, there will be 6 valence electrons.
non-example of Newton's third law of motion
Answer:
Unbalanced forces
Explanation:
If a wave has a period of 20 s, what is its
frequency?
Answer:
f = 1/T
= 1/20
= 0.05 Hz
Explanation:
Frequency of wave is 0.05 Hz
Given thatWave period = 20 seconds
Find:Frequency of wave
Computation;Frequency of wave = 1 / Wave period
Frequency of wave = 1 / 20
Frequency of wave = 0.05 Hz
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How long does it take a cyclist to increase his velocity from 4.0m/s to 10m/s if he accelerates at 3.0m/s2
Two persons A and B are walking with the speed of 5km/h and 6km/h respectively in the same direction. Find how far will B be from A after 2 hours??
Answer:2 km
Explanation:
A man jumps from an airplane and does not
open
his parachute immediately. As he falls,
two forces act on him: the force mg due to
gravity and the force n, of air resistance. Now
he opens his parachute and begins to fall at
constant velocity.
What forces act upon him now?
Answer:
The forces acting on a skydiver jumping from a plane include the gravitational force and air resistance
Explanation: i, dumb so this is proabaly wrong
Help!!
Earth has a radius R = 1.5 x 1011 m, T= 365.3 days, and m= 5.97 x 1024 kg. Calculate the
speed of Earth around the sun, assuming a circular orbit.
Answer:
[tex]29861.23\ \text{m/s}[/tex]
Explanation:
[tex]R=\text{Radius of Earth's orbit}=1.5\times10^{11}\ \text{m}[/tex]
[tex]T=\text{Time taken by the Earth to complete the orbit}=365.3\ \text{days}[/tex]
Assuming the orbit is of circular shape the distance the Earth has to travel is the circumference
[tex]C=2\pi R\\\Rightarrow C=2\pi\times 1.5\times10^{11}\\\Rightarrow C=942477796076.938\ \text{m}[/tex]
Velocity is given by
[tex]v=\dfrac{C}{T}\\\Rightarrow v=\dfrac{942477796076.938}{365.3\times 24\times 60\times 60}\\\Rightarrow v=29861.23\ \text{m/s}[/tex]
The speed of the Earth around the Sun is [tex]29861.23\ \text{m/s}[/tex]
Which of the following is NOT an acceleration?
O Riding your bike faster when you head down a hill
Slowing your bike so you can make it up a hill
O Coming to a stop at an intersection
Riding down the street at a constant velocity
Answer:
coming to stop at intersecton
Explanation do u not know what acceleration is?
Who was the first person to walk on the moon ?
Answer:
god correct correct
Explanation:
What micro wave used for?
Answer:
Microwaves are widely used in modern technology, for example in point-to-point communication links, wireless networks, microwave radio relay networks, radar, satellite and spacecraft communication, medical diathermy and cancer treatment, remote sensing, radio astronomy, particle accelerators, spectroscopy, industria.
Explanation:
PLS HELP!!!- The moon rotates around the Earth every 28 days. What is the frequency of the moon’s revolution?
Answer: the frequency is every 27.322 days
what cells secrete myelin for neurons?
a. schwann cells
b. other neurons
c. osteocytes
d. leukocytes
Answer:
A. Schwann cells
Explanation:
A boat sends a sound to the bottom of the ocean and it takes 3 seconds to return to the boat. How deep in the ocean? The speed of sound on water is 1500m/s.
Answer:
2,250 meters deep
Explanation:
If the time taken for the the signal to return to the boat means that it took 3 seconds for the signal to travel to and from the floor the same distance. That means it took 1.5 seconds to travel to the floor at a speed of 1500m/s means that it is 1500 multiplied by 1.5 to a distance of 2,250m. (Derived from the speed = distance divided by time formula to distance = speed multipled by time)
2. Who was the first woman to dunk in a professional basketball game?
Answer: Lisa Leslie
Explanation: On July 30, 2002, Leslie became the first woman to dunk the ball in a WNBA game.
Answer:
Lisa Leslie
Explanation:
On July 30, 2002, Leslie became the first woman to dunk the ball in a WNBA game
Hydrogen is found as a gas on Earth but exists in all four states in the solar
system. Four samples of hydrogen have equal masses but are each in a
different state. Which statement about the relative amounts of thermal
energy in the samples is true?
Answer: the sample of solid has less energy than the sample of gas
Explanation:
APEX
Johnny often hits his brother even though his brother does not do anything to the tag and eyes assume Johnny aggression is more like most likely due to a combination of
Who is Josh Gibson write a short paragraph 3-5 sentences
Answer:
Hope this helps
Explanation:
Josh Gibson, (born December 21, 1911, Buena Vista, Georgia, U.S.—died January 20, 1947, Pittsburgh, Pennsylvania), American professional baseball catcher who was one of the most prodigious home run hitters in the game’s history. Known as “the black Babe Ruth,” Gibson is considered to be the greatest player who never played in the major leagues, there being an unwritten rule (enforced until the year of his death) against hiring black ballplayers
5. A vehicle having a mass of 1000 kg had an accident on a wet, but level, concrete road under foggy
conditions. The tires were measured to have y = 0.55 on wet concrete. The driver locked the
brakes, skidded for 6 seconds, and then hit the guardrail causing a very small dent because the
vehicle stopped just as it touched the guardrail. The driver claimed to be driving 65 miles per hour
(29 m/s). You have been hired as an investigator to determine if the driver is telling the truth.
a. What is the weight of the vehicle?
b. The frictional force produces the negative acceleration that reduces the velocity of the
vehicle from its initial unknown speed to zero. Find the value of the frictional force.
Use the frictional force to calculate the acceleration (remember that it is a negative
number). Hint: Use Newton's 2nd Law.
d. Using your acceleration from partc, what was the driver's initial velocity? Hint: Use this
equation - The final velocity is 0 m/s.
6. Complete this form to let me know what your questions are. This helps me get you the help you
need - either during class or individually through videos
Answer:
Explanation:
1) weight = mg = 9.81*1000 = 9810 Newtons
2) frictional force = normal force *
we must assume that the vehicle is on a flat surface so therefore the normal force is the same as the weight of the vehicle.
frictional force = 9810 * 0.55 = 5 395.5 N
3) acceleration: F = ma, a = F/m
assume that only the frictional force is acting on the vehicle:
a = 5395.5/1000 = 5.3955 m/s
4) the car decelerates at 5.3955m/s
over 6 seconds, the car decelerates by: 32.37m/s
5) original speed = 29m/s final speed = 29-32.37 = -3.37m/s which is a negative number, therefore the vehicle would have stopped before it hit the rail.
6) to get to the rail, the vehicle would have had to be traveling at least 32.37m/s which is 72.41 mph
Help please asap!!!!
Answer:
Line A is fastest and Line D is slowest
Explanation:
Line A is the fastest moving object because the bar is steepest. Line A travelled the furthest in the least time, so Line A is moving fastest. Line D is the slowest object because the bar is least steep. Line D travelled the least distance in the most time, so Line D moves the slowest.
Hopefully the answer and explanation helps!
how do you find displacement
Answer:
Displacement can be calculated by measuring the final distance away from a point, and then subtracting the initial distance. Displacement is key when determining velocity (which is also a vector). Velocity = displacement/time whereas speed is distance/time. I hope it helped. Please give brainliest
Explanation:
when maggie applies the brake of her car, the car slows
Which of these chemical properties of a sheet of paper
Answer:
Paper is created mainly from organic compounds such as oxygen, carbon, hydrogen. Paper has non-organic compounds also for improving the properties.
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First to answer.
How does using a ramp make work easier when loading a piano onto a truck three feet above the ground?
It allows a larger force to be applied over a shorter distance.
It allows a larger force to be applied over a longer distance.
It allows a smaller force to be applied over a shorter distance.
It allows a smaller force to be applied over a longer distance.
Answer:
It allows a smaller force to be applied over a longer distance.
Explanation:
A ramp is an example of an inclined plane that makes the movement of object easier above the ground level or higher surfaces.
In the given example, the sloping part of the ramp will support the weight of the piano as it moves up the slope and it will allow less force to be applied to move the piano above but the distance would be longer as the slant length or slope is the longest distance.
Hence, the correct answer is "d".
Answer:
D. It allows a smaller force to be applied over a longer distance.
Explanation: