Which of the following does not possess the ability to do work not because of motion?

A. A sparrow flying in the sky

B. A sparrow moving slowly on the ground

C. A sparrow in the nest on a tree

D. A squirrel going up a tree

Each of the following statement describes a force - acting. Which force is causing work to be done?

A. The weight of a book at rest on a table

B. The pull of a moving railway engine on its coaches

C. The tension in an elastic band wrapped around a parcel

D. The push of a person’s feet when standing on the floor

A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s^-2, the work done by her after climbing 2 m will be:

A. 200 J B. 800 J

C. 8000 J D. 2000 J

A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value for the stone?

A. Its acceleration

B. Its kinetic energy

C. Its potential energy

D. Its weight

A boy tries to push a truck parked on the roadside. The truck does not move at all. Another boy pushes a bicycle. The bicycle moves through a certain distance. In which case was the work done more: on the truck or on the bicycle? Give a reason to support your answer.