How to culculate it

Newton's laws of motion - Wikipedia, the free encyclopedia

1st law-A body continues to be in its state of rest or of uniform motion in a straight line unless an external force is applied on it.

2nd law-The rate of change of momentum of a body is directly proportional to the force applied on it and this change in momentum takes place in the direction of the applied force.

3rd law-To every action there is an equal and opposite reaction.