A body is being raised to height h from the surface of earth. What is the sign of work done by gravitational force?

A body is being raised to height h from the surface of earth. What is the sign of work done by applied force

What is the work done by centripetal force?/

A body is moving at constant speed over a frictionless surface. What is the work done by the weight?

What is the value of 'g' at a height near the surface of earth?

A rain drop of radius 2 mm falls from a height of 500 nr above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational force on the drop in the first and second half of its journey ? What is the work done by the resistive force in the entire journey if its speed on reaching the ground is 10 m s^-1 ?

It is well known that a rain drop falls under the influence of the downward gravitational force and the opposing resistive force. The latter is known to be proportional to the speed of the drop, but is otherwise undetermined. Consider a drop of mass 1.0g falling from a height of 1.00km. It hits the ground with a speed of 50.0ms^(-1) (a) What is the work done by the gravitational force ?

A body of mass 6 kg is kept at a height of 5 m from the surface of earth. Find the potential energy of the body.