Question

A force of 5 N is used to displace a block by 5 m in the first case and by 2.5 m in the second case. If the work done is W and W’ respectively, the relation between W and W’ is

• A. W > W’
• B. W < W’
• C. W = W’
• D. W > W’ or W < W’ depending on final velocity of the block

Answer 1

The correct option is A

W > W’

For a given force, work done is directly proportional to displacement of the body. In the second case, the displacement is less. Hence, work done is also less, i.e., W’ < W or W > W’.