WBCS.LIVE practice question

Consider the following statements. I. When a coole carrying a load on his head moves on a horizontal platform, the work done by the coole against gravity is zero. II. When a satellite revolves in a circular orbit around the earth, the work done by the gravitational force on the satellite is zero. III. When a body falls freely under gravity, the work done by gravity is negative. IV. Work is a scalar quantity. Which of the statement(s) given above is/are correct?

Solve this multiple-choice question and check the correct answer with its explanation below.