Question

Suppose you are standing with your friend. Suddenly , you push your friend and he falls down. According to Newton's third law the friend has also pushed you with a force of equal magnitude. Why did you not fall down?

Answer 1

See friend , you have applied a force on your friend (action) and your frnd has come into motion.because the force applied by you greater than the frictional force. Now the reaction force acts on you of equal magnitude but you are in the conscious state to balance the reactional force and thus you don't move. Also if your weight is more than more frictional force will be acting on you so it will be requiring more force to tackle that. Hope you understand.

Answer 2

Answer:

As per Newton's third law, when you'll push your friend there will be equal and opposite resistive force from his body. This force does not mean that your friend will push you. It is the force offered by his body.