Transcript sciemce-Force_and_Motion

• Sir Isaac Newton
• 1642 – 1727
• Laws of Motion
Potential
Energy
stored energy
Kinetic
Energy
Energy in motion
Force
A push or pull
Forces cause
objects to
Speed up
Slow down
Change direction
Stay on the ground
Balanced
Forces
no movement
Unbalanced
Forces
movement
Inertia
keep on doing what it’s
doing
At rest- stay at rest
In motion – stay in
motion
… until another force
acts on it!
Momentum
The amount of mass
and the speed at
which that mass is
moving.
More mass + more
speed =
more momentum
More momentum =
difficult to stop
Gravity
Gravity is a force that
attracts objects
together.
The larger an object’s mass,
the greater the
gravitational force
The greater the distance
between two objects, the
smaller the gravitational
force
On earth, this force attracts
everything to Earth
Friction
The force between two
objects in contact with
each other.
Friction is a Force
- Resistive force
- The force of friction works in the opposite
direction of the force of motion
- Causes objects to slow down and/or stop
- Useful and wasteful friction
- Air Resistance- a larger surface area
usually results in greater air resistance
From Glencoe Physical
Science
Mass
The amount of matter
The greater the
mass…
- The more gravity pulls on it
- The greater the friction
- The greater the force
required to move it
- The greater the inertia
- The more the momentum
Simple Machines
Help increase your force
to make work easier.
Force and Motion Jeopardy