A body of mass 5 kg is moving with an acceleration of 5 ms-2 gets a displacement of 2m, the work done by the force is:
100 J
75 J
50 J
25 J
A child is moving on a skateboard with a speed of 2 ms−1. After a force acts on him, his speed becomes 3 ms−1. Calculate the work done by the force, if the mass of the child is 20 kg.