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Saturday, March 14, 2009

Newton's third law

According to Newton's third law...

For every action

there is an equal and opposite

 re-action.



What does this mean?

This means that for every force there is a reaction force that is equal in size, but opposite in direction. That is to say that whenever an object pushes another object it gets pushed back in the opposite direction equally hard.



Let's study how a rocket works to understand
Newton's Third Law.


The rocket's action is to push

 down on the ground

with the force of its powerful engines, and the

reaction is that the ground pushes the rocket upwards with an equal force.



UP,
UP,
and
AWAY!







You have just learned about
Newton's Three Laws of Motion.



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