Work done by a porter standing with luggage on his head is ……….

Answer true or false. Work is done by a coolie standing still with heavy luggage on his head.

From the following activities find out whether work is positive, negative or zero. Give reasons for your answers: A coolie is standing with a load on his head.

A porter is standing with a suitcase over his head. What is the work done by him?

Calculate the work done by a porter holding a suitcase weighing 5 kg in his hand.

A coolie moves on a horizontal platform with luggage on his head. The work done by coolie on the luggage is zero.

A porter with a suitcase on his head is climbing up steps with uniform speed. The work done by the "weight of the suitcase" on the suitcase is …..