Question

work done by gravity on a body
Moving upwards is

Answer 1

Answer:

The work done by gravity on body is gravitational force.

Answer 2

The work done by gravity on a body moving upwards is negative.

• The work done on a body is the scalar product of the force and the distance moved by the body.
• W = F.s
• If the direction of force and the distance are opposite, negative work is done. If they are in the same direction, positive work is done.
• The gravitational force of the earth always pulls the body downwards. Hence its direction is always downwards.
• In the given situation, the body moves upwards. Hence, the force and the distance are in opposite directions.
• That is why the gravitational force does negative work on the body.