Question

What
are (1)
(i) centripetal force
(ii) acceleration due to gravity (iii) free fall
(iv) escape velocity?
[1 Mark each)​

Answer 1

Explanation:

1-moving or tending to move towards a centre

2-gravitational acceleration is the acceleration of an object in vacuum

3-free fall is any motion of a body where gravity is the only force acting upon it

4-escape velocity is the minimum speed needed for a free, non-propelled object to escape from the gravitational influence of a massive body,

Answer 2

Answer:

1. centripetal force: the force acting on any moving in a circle and directed towards the centre of the circle is called as centripetal force
2. Acceleration due to gravity : The acceleration produced in a body under the influence of the force of gravity Alone is called acceleration of the gravity
3. Free fall: The motion of any object under the influence of the force of gravity Alone is called as free fall
4. Escape velocity: the minimum velocity with which a body should be projected from the surface of a planet or moon ,so that it escape from the gravitational influence of the planet or moon is called escape velocity

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