Question

what is 1] free fall 2] acceleration due to gravity 3] escape velocity 4] centripetal force?

Answer 1

Free fall is when an object falls towards ground with initial velocity 0 under the force of gravity.

Acc due to gravity is when earth's gravity induces an acceleration of -10m/s2

Escape velocity is minimum velocity needed by object to exit a planets gravitational field

Centripetal force is force applied on an object in circular motion towards centre