Achild in a tree house uses a rope attached to a basket to lift a 24 n dog upward through a distance of 4.9 m into the house.
how much work does the child do in lifting the dog?

117.6 Joules

We are given;

We are required to calculate the work done

In this case;

Force applied is equivalent to the weight of the dog.

Work done = 24 N × 4.9 m

                  = 117.6 Joules

Hence, the work done in lifting the dog is 117.6 Joules

f is prop to m1xm2 double m1 double force