May 30, 2013

Third Law of Motion


What happens if you pull a rope that is attached to a wall?



Would it be different if it is attached to an elephant?







According to Newton's third law...


For every action there is an equal and opposite reaction.


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!


















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