Question

A weightlifter lifts a weight off the ground and holds it up :

• A. Work is done in lifting as well as holding the weight
• B. No work is done in both lifting and holding the weight
• C. Work is done in lifting the weight but no work is required to done in holding it up)
• D. No work is done in lifting the weight but work is required to be done in holding it up

Answer 1

Answer: (C)

Work is done in lifting the weight but no work is required to done in holding it up)

Answer 2

When a weightlifter lifts a weight work done by the lifting force,

Work done in holding it up

$\mathrm { W } _ { 2 } = 0$ (because displacement is zero)