Rewrite the following sentences using proper alternative.

The work done on an object does not depend on ….

i. displacement

ii. applied force

iii. initial velocity of the object

iv. the angle between force and displacement.

Rewrite the following sentences using proper alternative.

The total energy of an object falling freely towards the ground …

i. decreases

ii. remains unchanged

iii. increases

iv. increases in the beginning and then decreases

Rewrite the following sentences using proper alternative.

If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy….

i. will be twice its original energy

ii. will not change

iii. will be 4 times its original energy

iv. will be 16 times its original energy.

Study the following activity and answer the questions.

1. Take two aluminium channels of different lengths.

2. Place the lower ends of the channels on the floor and hold their upper ends at the same height.

3. Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.

Questions

At the moment of releasing the balls, which energy do the balls have?

Study the following activity and answer the questions.

1. Take two aluminium channels of different lengths.

2. Place the lower ends of the channels on the floor and hold their upper ends at the same height.

3. Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.

As the balls roll down which energy is converted into which other form of energy?