Question

Pieter picked up a 20-newton book from the floor. Then he passed it to Ahmad, who carried it for 20 meters. How much work did Ahmad do?

Answer 1

Answer:

Work done to move the block from bottom to top is 400 J

Explanation:

Work is done against gravity here to move the book from floor to the top

So here work done is given as

W = mgH

here we know that

mg = 20 N

also we know that

H = 20 m

so we have

W = 20(20) J

$W = 400 J$