A coolie with load on his head is walking on a horizontal platform. What is work done against gravity.

no work is done against gas.

Consider the following statements. Work is not done, when: 1. a man is walking on a horizontal road. 2. a man is climbing up a hill. 3. a man with a load on his head is walking on a horizontal road. 4. moon is revolving round the earth. Which of the statements given above are correct?

How much work is done by a coolie walking on a horizontal platform with a load on his head?

A coolie carries a load of 50 kg on his head and walks on a level road upto 100m. What is the work done by him?

Statement-1: A person walking on a horizontal road with a load on his head does no work on the load against gravity. Statement-2: No work is said to be done, it directions of force and displacement of load are perpendicular to each other.

A person is holding a suitcase and moving on a horizontal platform. Is he doing any work?