Newton's Third Law

Here we discuss about Newton’s third law of motion.

You may also be interested in Newton’s First Law and Newton’s Second Law of Motion

Newton’s 3rd Law states that:

“Actions and reactions are Equal in magnitude but in opposite direction”.

This law tells us the universal truth that all the bodies in the environments show pair of action-reaction forces that are equal in magnitude but opposite in direction.

If an force is acted on a body and at the same time an reaction of equal magnitude act on this body in opposite direction, then we can write Newton’s Third Law in the form of an equation as shown below:

F_A = -F_B

Here F_A is the Action that is exerted by body A on body B and as the result an reaction of force (-F_B) of equal in magnitude acts on body A from the body B.

We should not miss up Newton’s First Law and Newton’s Law of Motion, because when we exert the force on the ground, then there is reaction of equal magnitude in the opposite direction, then how could we jump off the ground?

The answer to this question is simple, that it is ensure that when we exert force on the ground then there is reaction from the ground in equal magnitude and in opposite direction, but there are other forces like our push up forces and weight to allow us to jump off the ground but if we fail to push up, then we will not jump off the ground.

So, Now, Hopefully, you will be able to understand Newton’s Third Law of Motion.