Question

What are (i) free fall, (ii) acceleration
due to gravity (iii) escape velocity (iv)
centripetal force ?​

Answer 1

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Answer 2

Answer:

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(i) A body is said to be under free fall when no other force except the force of gravity is acting on it.

(ii) The acceleration with which an object moves towards the centre of Earth during its free fall is called acceleration due to gravity. It is denoted by the letter ‘g’. It is a constant for every object falling on Earth’s surface.

(iii) The minimum velocity required to project an object to escape from the Earth's gravitational pull is known as escape velocity. It is given as:

ve= √2Rg

(iv) The force required to keep an object under circular motion is known as centripetal force. This force always acts towards the centre of the circular path.