Question

which event does not describe potential energy being changed into kinetic energy

a.a cart roll down hill
b.a rubber foam is being compressed
c.a student lets go a stretched slinky
d.a twig falls from a branch

Answer 1

B because is not describe potential energy being changed into kinetic energy

Answer 2

Answer:

Potential energy is changed into kinetic energy is not described when a rubber foam is being compressed.  Option b. is correct.

Explanation:

• The energy which is due to the position or height of the body is called potential energy.
• The energy which is due to the motion or movement of the body is called kinetic energy.
• When a body is compressed or stretched, elastic potential energy is stored in the body.

Step 1:

In the given events, when a cart rolls down the hill, potential energy is converted to the kinetic energy of the cart.

In a slinky that is stretched elastic potential energy is stored, so when it is released the kinetic energy is formed.

In a twig that falls from a branch, potential energy is converted to kinetic energy.

Step 2:

In a rubber foam that is compressed elastic potential energy is stored. But it is in the same form not released so, kinetic energy is not formed.

Hence, a rubber foam is being compressed does not describe potential energy being changed into kinetic energy.

Option b. is correct.