#### Newton`s 3rd Law of Motion

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Transcript Newton`s 3rd Law of Motion

nd
2
Newton’s
and
of Motion
rd
3
Law
Newton’s 2nd Law of Motion
A net force acting on an object causes the
object to accelerate in the direction of the force
“A net force acting on an
object…”
Smaller the mass the greater it will accelerate
If you apply the same force to a marble and to a
bowling ball the marble will go faster
“….accelerate in the direction of
the force”
Greater the force applied, the greater the
acceleration
2 objects that are the same masses, the one with
more force applied to it will go faster
2nd Law Formula
Force = mass X acceleration
F=mXa
Newton’s 3rd Law of Motion
For every action there is an equal but opposite
reaction.
All forces act in pairs with one object exerting
a force on a second object, and the second
object exerting a force back
Action-Reaction Pairs
Person on trampoline
Jumping off a boat
Swimmer moving through water
Forces may not be balanced.
This causes things to move, like a person
throwing a basketball from a wheelchair.
Momentum
Momentum is a property of a moving object
because of its mass and velocity.
If an object is not moving it has zero
momentum
Momentum only changes if velocity, mass or
both change
Momentum can be transferred
Law of Conservation of Momentum
Total momentum never changes unless a force
acts on the object (like gravity)