Transcript The push or pull on an object.

The push or pull on an
object.
Force or attraction
between two
objects.
Measure of the force of
attraction between an
object and Earth.
A newton is the metric unit
used to measure weight.
Many forces act
together on an object.
However, it is not always
easy to determine what is
exerting a force or what is
receiving a force.
When forces are applied in
the same direction, the
forces are added together.
Example: paddling a boat in the
same direction helps the boat
to go faster.
When forces are applied in
opposite directions, subtract
the smaller force to determine
the direction.
Example: tug-a-war
Isaac Newton proposed three
laws of motion.
His laws combined the
findings of other scientists
with his own observations.
Isaac Newton is
best known for
stating that
gravity exists
throughout the
universe.
Process of moving from
one place to another.
3 Types of
motion
1.Straight line
example: walking
forward
2.Circular paths
example: airplane ride
at amusement park
3.Vibrations
example: string
instruments
Change in position of one
object compared to the
position of another object.
Does the sun
move
or the Earth?
Rate at which the position
of an object changes.
Two units of measure are
required to indicate speed.
1.Any unit of time
Ex: seconds, minutes, hour
2.Any unit of distance
Ex: centimeters, meters
Includes both a speed and a
direction.
Speed of a car:
65 miles/hour
Velocity of a car:
65 miles/hr to the west
Tells the rate at which
velocity is changing, and
includes a direction.
Acceleration occurs when a
moving object speeds up,
slows down, or changes
direction.
Any change in velocity is
acceleration.
Slowing down is
negative acceleration.
A car goes from 0 miles/hr
to 60 miles/hr in 10 seconds,
the average acceleration is 6
miles/hr/second.
Force between surfaces
that resists the
movement of one surface
past another surface.
Friction also exists
between an object rolling
across another surface.
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 at the
same speed and in the same
direction unless acted upon by
an unbalanced force.
Newton’s Second Law of
Motion
Moving objects move in the
direction the force is applied.
Newton’s Third Law of Motion
For every action there is an
equal & opposite reaction.
The tendency for all
objects to resist any
change in motion.