A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.
Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work.
A force of 30 N acts on a body and moves it through a distance of 5 m ip the direction of force. Calculate the work done by the force.
Write true or false
A coolie does no work against the force of gravity while carrying a luggage on a road.