A weightlifter lift a weight off the ground and holds it up, then

Options

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 by 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

C

Explanation

When a weight lifter lifts a weight by beight h(say).then work done by the lifting force F :
`W_(1) = Fs cos 0^(@) = + Fs`
but work done in holding it up is zero because the displacement is zero