For each of the following changes, describe whether (1) kinetic energy is being

Question

For each of the following changes, describe whether (1) kinetic energy is being converted into potential energy, (2) potential energy is being converted into kinetic energy, or (3) kinetic energy is transferred from one object to another. (More than one of these changes may be occurring.)

A car in an old wooden roller coaster is slowly dragged up a steep incline to the top of the first big drop.

After the car passes the peak of the first hill, it falls down the backside at high speed.

As it goes down the hill, the car makes the whole wooden structure shake.

By the time the car reaches the bottom of the first drop, it is moving fast

enough to go up to the top of the next smaller hill on its own.

Explanation / Answer

When slowly dragged up

Its slowly moving so its kinetic energy is not changing that is constant.

and potential energy is increasing. that energy comes from work done by some other force.

(like engine or some dragger's force)

after that it falls down :

Its potential energy starts converting into kinetic energy.

when reaches at bottom:

all potential energy converted into kinetic energy.

when it go up the smaller hill:

now its kinetic energy starts converting into potential energy.
hence KE decreases and PE increases.

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