Statement of newton's third law of motion is " To every action there is always an equal and opposite reaction".
Thus,whenever a body exerts force on another then another object exert an equal force on previous body but in opposite direction
Force example motion of rocket depends on the third law of motion i.e, action and reaction .Rocket exerts action force on gas jet in backward direction
Force of action and reaction acts on different objects i.e,
Force object 1 exerts on object 2= Force object 2 exerts on object 1
i.e,
F12=-F21
Action=-(Reaction)
According to Newtonian mechanics force is always a mutual interaction between the bodies and force always occurs in pairs
Equal and opposite mutual forces between two bodies is the basic idea between Newton's third law of motion
While considering a system of particles ,internal force always cancel away in pairs i.e consider two particles in a body if F12 and
F21 are internal forces between particle system 1 and 2 then they add up to give a null internal force.Same way internal forces for the particles
