Question

in the following cases state whether work is done or not justify your answer 1)a student reads a book 2) the revolution of earth around the sun

Answer 1

1. When a student read a book the work is said not to be done because in this situation not displacement is taking place and work is said to be done if the body gets displayed by the force acting upon it
2. in the situation work is said to be done buckle the earth is getting displaced around its axis