Transcript Newton`s Laws Powerpoint

Newton’s Laws of
Motion
Sir Isaac Newton




Born Jan. 4, 1643 in
England.
As a young student,
Newton didn’t do well in
school.
He worked hard and
continued his education.
Later in life, Newton
contributed ideas that
became law in the worlds
of science and math.
Newton’s First Law of Motion

“An object at rest tends to stay at rest and
an object in motion tends to stay in motion
with the same speed and in the same
direction unless acted upon an outside
force.”
A
ball will stay in place until a
force causes it to move . . .
 Picked
up
 Kicked
 Gravity
causes it to roll
downhill
Newton’s Second Law of Motion
 Force
= mass X acceleration
 Or
 acceleration

F
= force
mass
m
a
Force is measured in Newtons (N)
 Mass is measured in Kilograms (Kg)
 Acceleration is measured in meters per
second squared (m/s2)


GRAVITY HAS AN ACCELERATION OF 9.8 m/s2
For example…

The acceleration (change of speed
or direction) of a truck will be less
than the acceleration of a golf ball
if the same force is applied.

If YOU push on a golf ball it will
move the truck won’t move.
Newton’s Third Law of Motion
"For every action, there is an
equal and opposite reaction."
 Forces ALWAYS act in pairs

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When releasing a balloon, the force of the air leaving the
back of the balloon will cause the balloon to move
forward.
Action

Reaction
Balanced / Unbalanced Forces
 Balanced
Forces - When combined
forces exerted on an object add up to
zero. (There is not a change in
motion, so the object stays at rest.)
 Unbalanced forces - occur when you
have more force on one side than the
other.