Download Newton`s Laws of Motion

Newton’s Laws of
Motion
Sir Isaac Newton
Born Jan. 4, 1643 in England.
 As a young student he didn’t do well in
school.
 He worked hard and continued his
education.
 Later in life he enjoyed learning and
contributed ideas that became law to the
science and math world.

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.”
Newton’s 2nd Law of Motion
The acceleration (change of
speed or direction) of an
object depends on its mass
and the amount of force
applied.
Newton’s Second Law of Motion
Force = mass X acceleration
For example…
Equal force on different
masses will result in different
accelerations
Newton’s Third Law of Motion
 "For
every action, there is an
equal and opposite reaction."
Reaction
Action
Fill in Notes: Newton’s Second
Law
F
= ma
 What does the equation mean?
 F = Force (unit is Newtons)
 m = mass (unit is Kilograms)
 a = acceleration (unit is meters/second2)
Units
Force is measured in Newtons
 Mass is measured in grams, kilograms etc.
 Acceleration - the rate at which an object
changes its velocity." (remember: speed
with direction)
 Acceleration values are expressed in units
of velocity/time. Typical acceleration units
include the following:
 m/s/s
mi/hr/s
km/hr/s

 Remember
that velocity is the speed
and direction of an object. And…
 Remember that speed is the rate of
change of an objects position. Well…
 Acceleration is the rate of change of
an object’s velocity.
 Force
is defined as a push or pull
that one object exerts on another
object.
 Mass is the amount of matter
contained in an object.
 So
what does this mean…
 *Newton found a connection with
force, mass and acceleration.
 Force = mass x acceleration
 * You will need to use the “Triangular
Formula” to solve for problems.
Newton’s Second Law
F
m
a