A man has a weight of 100 Newtons. How much work is done if he climbs 4meters up a ladder?

400 J

Explanation:

Work is done when a force that is applied to an object moves that object.

The work is calculated by multiplying the force by the amount of movement of an object

W = F * d

here the man has to work against the gravitational field. (against his weight)

F = 100 N

Work done = F * d

= 100 * 4

= 400 J