Answer:
Normal Force, Applied force, Gravitational Force, Spring Force
Explanation:
Normal Force so that he does not fall into trampoline, spring because the trampoline spring down when the force goes down, then up putting force upwards, gravitation because of gravity, and applied because of jumping
Answer:
i told u my thing got deleted lol
Explanation:
An object with a mass of 2.0 kg accelerates 2.0 m/s^2. What is the amount of force acting on the object?
Answer:
Explanation:
When the mass
m
is being accelerated with an acceleration of
a
,we can say the net force acting in the direction of acceleration is
F
=
m
a
here,it is given that only one force
F
was applied to cause this acceleration, and also given,
m
=
2
K
g
,
a
=
2
m
s
−
2
So,
F
=
2
⋅
2
=
4
N
Answer:
4N
Explanation:
given formula solution
m=2kg F=ma F=2kg×2m/s^2
a=2m/s^2 =4N
A student pulls a block across the desk in physics class. He applies 14N of
tension in the string, but friction holds the box back with 4N. His partner
measures the acceleration of the box across the desk to be 2m/s2. What
must the mass of the box be?
100 Pointsss hellppp
can you please show a picture
1. Which of these is not a property of a soun wave? A. Elasticity B. Loudness C. Pitch
Answer:
A
Explanation:
Can someone help pls
A bowling ball of 35.2kg, generates 218 kg.m/s units of momentum. What is the velocity of the bowling ball?
Answer:
[tex]6.18\:\mathrm{m/s}[/tex]
Explanation:
The momentum of an object is given by [tex]p=mv[/tex].
Plugging in values, we have:
[tex]218=35.2v,\\v=\frac{218}{35.2}=\fbox{$6.18\:\mathrm{m/s}$}[/tex].
Q2. An initially stationary 18-kg curling rock has a force applied to it over 2.0s. Its released with a velocity of 8.3 m/s [forward]. Determine the magnitude and direction of the applied force. Try solving this problem two different ways.
Answer: 74.7 N
Explanation:
Both approaches yield the same result: the magnitude of the applied force is approximately 74.7 N, and its direction is forward.
To solve this problem, we'll use two different approaches: Newton's second law and the work-energy principle.
Approach 1: Newton's Second Law
Newton's second law states that the force applied to an object is equal to the change in momentum of the object over time.
Step 1: Calculate the initial momentum (pinitial) of the curling rock.
pinitial = m * vinitial
pinitial = 18 kg * 0 m/s (since it's initially stationary)
pinitial = 0 kg m/s
Step 2: Calculate the final momentum (pfinal) of the curling rock.
pfinal = m * vfinal
pfinal = 18 kg * 8.3 m/s
pfinal = 149.4 kg m/s
Step 3: Calculate the change in momentum (Δp).
Δp = pfinal - pinitial
Δp = 149.4 kg m/s - 0 kg m/s
Δp = 149.4 kg m/s
Step 4: Calculate the magnitude of the applied force (Fapplied).
Fapplied = Δp / Δt
Fapplied = 149.4 kg m/s / 2.0 s
Fapplied = 74.7 N
Step 5: Determine the direction of the applied force.
The direction of the applied force is forward since the curling rock is released with a velocity of 8.3 m/s forward.
So, according to Newton's second law, the magnitude of the applied force is 74.7 N, and its direction is forward.
Approach 2: Work-Energy Principle
The work-energy principle states that the work done on an object is equal to the change in its kinetic energy.
Step 1: Calculate the initial kinetic energy (KEinitial) of the curling rock.
KEinitial = 0.5 * m * [tex]vinitial^2[/tex]
KEinitial = 0.5 * 18 kg * (0 [tex]m/s)^2[/tex]
KEinitial = 0 J
Step 2: Calculate the final kinetic energy (KEfinal) of the curling rock.
KEfinal = 0.5 * m * [tex]vfinal^2[/tex]
KEfinal = 0.5 * 18 kg * (8.3 [tex]m/s)^2[/tex]
KEfinal = 0.5 * 18 kg * 69.0 [tex]m^2/s^2[/tex]
KEfinal = 621.0 J
Step 3: Calculate the work done on the curling rock (W).
W = KEfinal - KEinitial
W = 621.0 J - 0 J
W = 621.0 J
Step 4: Calculate the magnitude of the applied force (Fapplied) using the work done.
Fapplied = W / d
Fapplied = 621.0 J / 2.0 s
Fapplied = 310.5 N
Step 5: Determine the direction of the applied force.
The direction of the applied force is forward since the curling rock is released with a velocity of 8.3 m/s forward.
So, according to the work-energy principle, the magnitude of the applied force is 310.5 N, and its direction is forward.
Both approaches yield the same result: the magnitude of the applied force is approximately 74.7 N, and its direction is forward.
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From the poem Black woman what does it mean by Savannah stretching to clear horizons, Savannah shuddering beneath the East wind's eager caresses.
Answer:
From the poem Black woman what does it mean by Savannah stretching to clear horizons, Savannah shuddering beneath the East wind's eager caresses.
Explanation:
how is velocity ratio of wheel and axle calculated
Answer:
VR = [tex]\frac{Radius of the wheel}{Radius of the axle}[/tex]
Explanation:
Velocity ratio (VR) of a machine is a term that compares the distance moved by effort put into the machine to the distance moved by the load.
A wheel and axle is a device for lifting of a load through a height. It is made up of two circular parts called wheel and axle. Its velocity ratio (VR) can be determined by:
VR = [tex]\frac{Radius of the wheel}{Radius of the axle}[/tex]
For a practical wheel and axle, the diameter of the wheel is greater than the diameter of the axle.
which property of a conducting wire is utilised in making electric fuse
Answer:
property of low melting point
Explanation:
When too much current flows through the low resistance element of the fuse, the element melts and breaks the circuit
A wheel of mass 50 kg has a radius of 0.4 m. It is making 480 rpm. What is the
torque necessary to bring it to rest in 40 seconds?
Solution:
Answer:
The torque necessary to bring the wheel to rest in 40 seconds is 10.4 N·m
Explanation:
The question is with regards to rotational motion
The rotary motion parameters are;
The mass of the wheel = 50 kg
The radius of the wheel = 0.4 m
The rate of rotation of the wheel = 480 rpm
The time in which the wheel is to be brought to rest = 40 s
The rotational rate of the wheel in rotation per second is given as follows;
480 r.p.m = 480 r.p.m × 1 minute/(60 seconds) = 8 revolution/second
1 revolution = 2·π radians
Therefore, we have the angular velocity, ω, given as follows;
ω = 2·π × 8 revolutions/second ≈ 50.3 rad/s
The angular acceleration, α, is given as follows;
[tex]\alpha = \dfrac{\Delta \omega}{\Delta t} = \dfrac{\omega _2 - \omega_1}{t_2 - t_1}[/tex]
Whereby the wheel is brought to rest from its initially constant rotational motion in 40 seconds, we have;
ω₁ ≈ 50.3 rad/s, ω₂ = 0 rad/s, and t₂ - t₁ = 40 seconds
Plugging in the values for the variables of the equation for the angular acceleration, "α", we get;
[tex]\alpha = \dfrac{0 - 50.3 \ rad/s}{40 \ s} \approx 1.3 \ rad/s^2[/tex]
The torque on the wheel, τ, is given as follows;
τ = m·r²·α
Where;
m = The mass of the object = 50 kg
r = The radius of the wheel = 0.4 m
α = The acceleration of the wheel ≈ 1.3 rad/s²
Therefore;
τ = 50 kg × (0.4 m)² × 1.3 rad/s² ≈ 10.4 N·m
The torque necessary to bring the wheel to rest in 40 seconds = τ ≈ 10.4 N·m.
Answer:
-10.048 N m
Explanation:
Can someone please help?
Answer:
B
Explanation:
Speed is distance divided by time.
Determine the force of gravitational attraction between the earth (m = 5.98 x 1024 kg) and a 70-kg physics student if the student is in an airplane at 40000 feet above earth's surface. This would place the student a distance of 6.39 x 106 m from earth's center.
Answer:
[tex]F=683.790939[/tex]N
Explanation:
From the Question we are told that
Earth mass [tex]m_1= 5.98 * 10^2^4 kg[/tex]
Students mass [tex]m_2=70kg[/tex]
Distance of student from earth center Radius [tex]r=6.39 * 10^6 m[/tex]
Generally the equation for Force of attraction b/w the earth and the boy is mathematically given by
[tex]F=\frac{Gm_1m_2}{r^2}[/tex]
[tex]F=\frac{6.67.10^-^1^1*( 5.98 x 10^2^4)(70)}{(6.39 *10^6)^2}[/tex]
Therefore the force of attraction b/w the student and the earth is
[tex]F=683.790939N[/tex]
[tex]F\approx 684N[/tex]
someone please help with this
Answer:
The new force is 2/3 of the original force
Explanation:
Coulomb's Law
The electrical force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between the two objects.
Written as a formula:
[tex]\displaystyle F=k\frac{q_1q_2}{d^2}[/tex]
Where:
[tex]k=9\cdot 10^9\ N.m^2/c^2[/tex]
q1, q2 = the objects' charge
d= The distance between the objects
Suppose the first charge is doubled (2q1) and the second charge is one-third of the original charge (q2/3). Now the force is:
[tex]\displaystyle F'=k\frac{2q_1*q_2/3}{d^2}[/tex]
Factoring out 2/3:
[tex]\displaystyle F'=\frac{2}{3}k\frac{q_1*q_2}{d^2}[/tex]
Substituting the original force:
[tex]F'=\frac{2}{3}F[/tex]
The new force is 2/3 of the original force
Electric potential energy is the energy of a charge based on
A.
the magnitude of its charge and its position in an electric field.
B.
the magnitude of its charge, its mass, and its speed.
C.
its mass and height above a given reference point in an electric field.
D.
its speed and the direction of its motion relative to a second charge.
Answer:
EPE is the ability to provide a charge within a circuit. It can be represented as a vector quantity, which has magnitude and direction.Hence A is correctWhen can a high speed velocity cause damage?'
Answer:
50 Mph.
Explanation:
According to the National Severe Storms Laboratory, winds can really begin to cause damage when they reach 50 mph. But here’s what happens before and after they reach that threshold, according to the Beaufort Wind Scale (showing estimated wind speeds): - at 19 to 24 mph, smaller trees begin to sway.
h m u i m he ll a b o r e d
Answer:
KITTEEENNSSSSS last one is what i got for critsmas KlikBot Hexagon Special Pack
Explanation:
Please help I’ll give you brain
Answer:
Explanation:
distance (km)
a) As near as I can tell from the graph, the distance travelled was 4km
b) I would answer 40 minutes, but don't be surprised if your instructor says 30 minutes.
c) The average speed is 4 km/40 minutes = 0.1 km/minute
A dependent variable is associated mainly with:
O A. the result of an experiment.
O B. the treatment group.
O C. the treatment in an experiment.
O D. the experimental group.
The experimental group and treatment group are the same group. It's just two different names for the same thing. If you apply a treatment to a group, then that's where you're performing the experiment.
For instance, if you are testing a fertilizer, then the independent variable would be "use of fertilizer or not using fertilizer". So that means the control group doesn't get any fertilizer. The dependent variable would be the heights of the plants between the two groups, so we can see if the fertilizer has an effect or not. This is the result of the experiment. So in other words, the input is the fertilizer (or no fertilizer), and the output is measuring the heights of the plants. The output is the result we analyze.
Keep in mind that the heights of the plants are likely to be randomly distributed. So this is where statistics comes into play. If the plants grow due to some random chance, and not necessarily the fertilizer, then you can use the control group to determine if that's the case or not. The control group helps you do this comparison.
As the name implies, "dependent" means it relies on something else. The height of the plant relies on if you used fertilizer or not. The independent variable is able to change without relying on any other variable.
Determine the force required to accelerate a 2 kilogram ball to an
acceleration of 9.8 m/s2
Answer:
19.6 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 2 × 9.8
We have the final answer as
19.6 NHope this helps you
PLEASE HELP!!!
Which two conditions would result in the weakest electric force between objects?
Answer:
B
Explanation:
objects are conductors with unbalanced charges
Answer:
D & A
Explanation:
A Skydiver has a mass of 48kg, what is the force that she exerts as she is falling to the ground?
Answer:
470.4N
Explanation:
Given parameters:
Mass of the skydiver = 48kg
Unknown:
Force she exerts as she is falling to the ground = ?
Solution:
The force she exerts while falling to the ground is her weight;
Weight = mass x acceleration due to gravity
Acceleration due to gravity = 9.8m/s²
Weight = 48 x 9.8 = 470.4N
Velocities of two bodies A and B are given in vectors notation as va =i+2j-3k and Vb=3i+2j-k what will be the relative velocity of b with respect to a?
Answer:
[tex]V_{B/A}=2i+2k[/tex]
Explanation:
The relative velocity can be calculated by means of the difference between vector B minus vector A.
[tex]V_{A}=i+2j-3k\\V_{B}=3i+2j-k\\V_{B}-V_{A}=(3-1)i + (2-2)j+(-1-(-3))k\\V_{B/A}=2i+2k[/tex]
Which identifies the energy transformations that take place in Anna’s body as this process takes place?
Mechanical energy is converted to kinetic energy, which is then converted to potential energy.
Chemical energy is converted to thermal energy and electrical energy.
Electrical energy is converted to chemical energy and thermal energy.
Mechanical energy is converted to potential energy which is then converted to kinetic energy.
Answer:
Chemical energy is converted to thermal energy and electrical energy.
Explanation:
Answer:
Which identifies the energy transformations that take place in Anna’s body as this process takes place?
Mechanical energy is converted to kinetic energy, which is then converted to potential energy.
*******Chemical energy is converted to thermal energy and electrical energy. *******CORRECT*******
Electrical energy is converted to chemical energy and thermal energy.
Mechanical energy is converted to potential energy which is then converted to kinetic energy.
Explanation:
Feb 2021 Edge 100% test
Please help i will give brainliest
Answer:
Answers below--
Explanation:
1. F/Force
2.H/Contact force
3.A/Non-contact force
4.C/electric force
5.D/gravity
6.I(i)/magnetic force
7.J/kilogram
8.G/newton
9.B/friction
10.E/lubricant
What is common between transverse waves and longitudinal waves?
Both include an amplitude, crest, and rarefactions
Both move faster at higher temperatures
Both move slower through densely packed molecules
Both include a wavelength from compression to compression
Answer:
b
Explanation:
i took the quiz
Both the transverse and longitudinal waves move faster at higher temperatures.
What is meant by transverse wave?A wave in which the motion of the particles is perpendicular to the direction of the wave propagation is referred to as a transverse wave.
Here,
As a result of the shear stress that is produced, transverse waves are frequently observed in elastic materials.
In this situation, the oscillations are caused by the displacement of the solid particles from their relaxed state in directions perpendicular to the wave's propagation.
The wave in which the particles of the medium oscillate parallel to the direction of propagation of the wave is called a longitudinal wave.
Sound waves similarly oscillate parallel to the direction of propagation, forming the compressions and rarefactions. Hence sound waves are called longitudinal waves.
Hence,
Both the transverse and longitudinal waves move faster at higher temperatures.
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Electromagnetic waves are classified as longitudinal waves.
Please select the best answer from the choices provided
T
F
Answer:
False
Explanation:
Electromagnetic waves are transverse waves. That means that the electric and magnetic fields oscillate in a plane that is perpendicular to the direction of wave propagation.
Answer:
false electromagnetic waves are not classified as longitudinal waves
Which two quantities can be expressed using the same units?
1.energy and force
2.impulse and force
3.momentum and energy
4.impulse and momentum
Answer: impulse and momentum
Explanation:
Impulse and momentum- two quantities can be expressed using the same units. Hence, option (4) is correct.
What is impulse?In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion. It is often stated in Newton-seconds or kilograms per second and is denoted by the symbol J.
Because a body with momentum cannot be halted, it must be forced to move in the opposite direction for a predetermined amount of time. The harder it is to stop, the more momentum there is. Consequently, more force must be applied and more time must be spent to stop the body.
Mathematically,
impulse = force· time
= mass × acceleration × time
= mass × ( change in velocity/time) × time
= mass × change in velocity
= change in momentum.
Hence, both Impulse and momentum have same unit.
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1. A kangaroo hops 84 m to the east in 7 seconds.
o What is the kangaroo's speed? 12 m/s
o What is the kangaroo's velocity?
Explanation:
Given parameters:
Distance hopped = 84m
Displacement = 84m due east
Time = 7s
Unknown:
Speed of kangaroo = ?
Velocity of kangaroo = ?
Solution:
To solve this problem,
Speed = [tex]\frac{distance}{time }[/tex] = [tex]\frac{84}{7}[/tex] = 12m/s
Velocity = [tex]\frac{displacement}{time}[/tex] = [tex]\frac{84}{7}[/tex] = 12m/s due east
Brian Berg of lowa built a house of cards 4.88 m tall. Suppose Berg throws a ball from ground level
with a velocity of 9.98 m/s straight up. What is the velocity of the ball as it first passes the top of
the card house?
Answer:
Vf = final velocity = 1.96 [m/s]
Explanation:
To solve this problem we must use the following equation of kinematics.
[tex]v_{f}^{2}=v_{o}^{2}-2*g*x[/tex]
where:
Vf = final velocity [m/s]
Vo = initial velocity = 9.98 [m/s]
g = gravity acceleration = 9.81 [m/s²]
x = vertical distance [m]
[tex]v_{f}^{2}=(9.98)^{2}-2*9.81*4.88\\v_{f}^{2} = 99.6-95.74\\v_{f}=\sqrt{3.8544}\\v_{f}=1.96[m/s][/tex]
Note: The negative sign of the gravity acceleration means that the gravity acceleration is pointing in the opposite direction of the movement.
Obtain a pillow made of foam rubber. Press
down hard with your two hands on the surface
of the pillow. Then withdraw your hands
Describe what happened to its shape while you
pushed hard on the pillow and when you
withdrew your pushing. Repeat this activity on
a piece of rectangular block of wood and a
plasticine. Note the different effects.
Answer: Only foam rubber is compressible material
Explanation:
The pillow is made up of foam rubber which can be compressed easily due to the soft compressible rubber with hands on application of pressure on the surface. The shape of pillow regain its original shape when the pressure is withdrawn from the pillow. If the same activity is performed on the piece of rectangular block of wood and plasticine. Then the rectangular block of wood cannot be compressed with hand as it is a solid body. Plasticine is a putty like material. It is a clay like material and it can be compressed with hand but when the pressure is withdrawn the plasticine does not regain its shape back.