## Work and Kinetic Energy

Two blocks of ice, one four times as heavy as the other, are at rest on a frozen lake. A person pushes each block the same distance *d*. Ignore friction and assume that an equal force is exerted on each block.

**A) Which of the following statements is true about the kinetic energy of the heavier block after the push?**

**B) Compared to the speed of the heavier block, how fast does the light block travel?**

**C) Now assume that both blocks have the same speed after being pushed with the same force . What can be said about the distances the two blocks are pushed?**

## Answer ( 1 )

A) Which of the following statements is true about the kinetic energy of the heavier block after the push?=> It is equal to the kinetic energy of the lighter block.

B) Compared to the speed of the heavier block, how fast does the light block travel?=> twice as fast

C) Now assume that both blocks have the same speed after being pushed with the same force . What can be said about the distances the two blocks are pushed?=> The heavy block must be pushed 4 times farther than the light block