Force

Force is like push or pull which can change the state of rest or of motion, or direction of motion of the body. 

Appling the any force, body may be accelerate or retard the motion of a body.

Force effects:

It can change the shape & size of the body. 

It can change the state of rest of a body. 

It can bring a moving object to rest. 

It can change the speed and direction of motion of a body.