Question

Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of 10 m s⁻¹. It implies that the boy is

A boy is whirling a stone tied with a string in an horizontal circular path. If the string breaks, the stone

What is the source of centripetal force that a planet requires to revolve around the Sun? On what factors does that force depend?

Suppose gravity of earth suddenly becomes zero, then in which direction will the moon begin to move if no other celestial body affects it?

The earth is acted upon by gravitation of Sun, even though it does not fall into the Sun. Why?