Q.1. List two conditions which need to be satisfied for the work to be done on an object. Ans. W...

Q1. Give two examples from everyday life where work is done. Ans. (i) We apply a force to lift a...

Q1. Give three examples when the object is not displaced in spite of a force acting on it. Ans. T...

 Q1. Briefly describing the gravitational potential energy, deduce an expression for the gravit...