Question

From the following activities find out whether work is positive, negative or zero. Give reasons for your answer.
1) A boy swimming in a pond.
2) A boy standing with a load on his head.
3) Reducing the speed of your bicycle by applying brakes.​

Answer 1

Answer:

gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.