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3 years ago

What are 3 ways acceleration can change?

Physics

1 answer:

Karolina [17]3 years ago

3 0

Velocity, direction, or both at the same time.

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There is a skier at the top of a ski slope. The skier has potential energy. What gives the skier his potential energy? A. his sp

NeTakaya

Answer:C

Explanation:

Skier at the top of a ski has Potential Energy due to gravity.

Potential Energy is the Energy Possessed by an object when it attains a height concerning some zero level Position.

During the process of attaining the height, some work has to be done against gravity and this energy stored within the object after attaining some height w.r.t relative zero position.

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3 years ago

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What is the magnitude of the net torque on the pulley about the axle?

jeyben [28]

Answer: Torque= tangential force × radius of the pulley

Explanation:

Pulley is a simple machine which helps us to lift loads by applying the force in a convenient direction. It consists of a grooved wheel which is free to rotate about an axle passing through the center of the pulley.

For a pulley, the torque $T=$ tangential force × radius of the pulley

Pulleys can be used in combination also to achieve a desired output.

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3 years ago

(50 POINTS) Set the ball and the barrier about two feet apart on the table. Grasp both ends of the ruler. Push the ball using th

padilas [110]

bounces off barrier back to rluler ....

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3 years ago

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Which of these forms of energy is NOT regularly given off by the sun?

IceJOKER [234]

D: Ultraviolet Rays is the answer hope that helps

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3 years ago

The displacement in simple harmonic motion is a maximum when the 1. velocity is a maximum. 2. kinetic energy is a maximum. 3. ve

dlinn [17]

Answer:

3. velocity is zero.

Explanation:

The velocity of a simple harmonic motion is given by

$v = \omega\sqrt{A^2-x^2}$

Here, ω is the angular velocity, A is the amplitude (or maximum displacement from the equilibrium point) and x is the displacement at any time.

At maximum displacement, x = A. Then

$v = \omega\sqrt{A^2-A^2} = 0$

Therefore, at maximum displacement, velocity is 0.

Practically, this can be observed in a simple pendulum. As it approaches the maximum displacement, its velocity reduces. It becomes zero at this point and then reverses as the pendulum changes course. Then the velocity begins to increase. It becomes maximum at the equilibrium point but once past that, the velocity begins to reduce as it approaches the other amplitude.

For acceleration,

$a = -\omega^2x$

It follows that at maximum displacement, the acceleration is a maximum. The negative sign indicates that it is in an opposite direction to the displacement. Both kinetic energy ( $\frac{1}{2}mv^2$ ) and linear momentum ( $mv$ ) are proportional to velocity; they are therefore both zero at the maximum displacement.

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3 years ago