Download Newton`s Third Law of Motion Newton`s Third Law of Motion

Newton's Third Law of Motion
Newton’s 3rd Law of motion is one of the most important.
3rd Law :
For every action force on a body there is an equal and opposite reaction force to it.
These forces create action­reaction pairs.
Newton's Third Law of Motion
Examples :
You pull on a rope, the rope exerts a tension on you.
Dennis punches the wall, the wall punches Dennis
Jory pushes down on the ground, the ground pushes up on Jory
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Action Force:
The boy pushes against the wall.
Reaction Force:
The wall pushes against the boy.
Action Force:
Earth Pulls Down on the man.
Reaction Force:
The Man pulls up on the Earth
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Action Force:
Moon Pulls on the Earth
Reaction Force:
Newton's Third Law of Motion
Identify the action and reaction forces in the diagram
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3rd Law problem
A person steps on a movers dolly. What happens
to the dolly? Does the person move relative to
the ground?
By the third law, for every step they take, the cart
moves in the opposite direction.
The person does not move relative to
the ground. The dolly moves in the opposite
direction of the person, equal to each
step taken
Newton's Third Law of Motion
The cart has a fan and a sail connected to
it. What will happen when the fan is
turned on?
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Newton's Third Law of Motion
What are the action-reaction pairs?
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