Question

a.
How much work is done when an object of 1000 N is lifted to
a height of 3m ?
(Ans: 3000 J)​

Answer 1

As you are lifting the object you are doing work on the object. The work W done on an object by a constant force is defined as W = F·d. It is equal to the magnitude of the force, multiplied by the distance the object moves in the direction of the force.