Two blocks of ice are at rest on a smooth frozen lake. One block is 3 times the

Question

Two blocks of ice are at rest on a smooth frozen lake. One block is 3 times the mass of the other block. A man pushes each block the same distance, d meters with an equal force. Which of the statements about the kinetic energy of the heavier block is true?

1. The kinetic energy of the heavier block is smaller than the kinetic energy of the lighter block.

2. The kinetic energy of the heavier block is greater than the kinetic energy of the lighter block.

3. The kinetic energy of the heavier block is equal to the kinetic energy of the lighter block.

4. It cannot be determined without knowing the force and the mass of each block.

What is Right?

Explanation / Answer

here

The kinetic energy gained
= work done by the force
= force*distance moved

Since force and distance are the same in each case, the kinetic energy gained is the same.

so the correct answer is

3. The kinetic energy of the heavier block is equal to the kinetic energy of the lighter block.

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