In which of the following case the work done by a force will be maximum: when the angle between the direction of force and direction of motion is 0^o or 90^o?

The work done by a force acting obliquely is given by the formula: W = F Cos θ × s. What will happen to the work done if angle between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant?

What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?

How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.

A man is instructed to carry a package from the base camp at B to submit A of a hill at a height of 1200 metres. The man weighs 800 N and the package weighs 200 N. If g = 10 m/s²,

(i) How much work does man do against gravity?

(ii) What is the potential energy of the package at A if it is assumed to be zero at B?