Q3 of 19 Page 116

Answer the following

State any two illustrations for Newton’s third law of motion.

According to Newton’s Third Law of Motion:

Every action done on an object has an equal and opposite reaction on the body.


Two Important things to note:


1. The reaction will be equal and opposite.


2. Both action and reaction are applied on the same object.


Two illustrations for this law are:


1. One of the major illustrations is in rocket science, as the rocket moves in the space by following the Newton's third law. Actually, when rocket moves in the space it pushes the gas outside from it, i.e., rocket applies force on the gases in the backward direction. As a reaction, the gases put equal amount of force on the rocket in the opposite direction and the rocket moves in the forward direction. That is away from the Earth.


2. Take an example of a person who slams the wall with his fist. The force applied by the person through his fist on the wall is equal to the force applied by the wall on the fist. Harder the person slams the wall, more he gets hurt. Similar procedure is followed when a person kicks the football.


In both these illustration we have observed that there is a reaction force in first case it was by the gases and in the second case it was by the wall. Hence these are some classic illustrations of the Newton’s Third Law.


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