It states: To very action, there is an equal and opposite reaction.
Mathematically,
FBA = -FAB
Where FBA is force on B due to A and FAB is force on A due to B. Therefore,
FAB + FBA = 0
Remember
1. The forces of action and reaction do not cancel each other because they act on different bodies.
Units of Force : Absolute unit of force in SI system is newton. IN = 1 kg. m/s2
The gravitational unit of force in kg wt or kg f.
1 kg wt = 1 kg f = 9.8 kg m/s2 = 9.8N
Impulse of a Force : A large force acting for a small time interval is said to impart an impulse to the object.
