Question

A boy of mass 80 kg is running at 10m/s. Find the work done

Answer 1

Mass = 80 kg

Velocity = 10 m/s

kinetic energy = 1/2 m v^2

                        = 1/2 (80)(10)^2

                        = 1/2 (80)(100)

                         =4000 J

Hence the wok done by a boy is 4000 J.

Answer 2

Answer:4000j

Explanation:Mass = 80 kg

Velocity = 10 m/s

kinetic energy = 1/2 m v^2

                       = 1/2 (80)(10)^2

                       = 1/2 (80)(100)

                        =4000 J

Hence the wok done by a boy is 4000 J.

Hope this answer will help u