Force and Motion

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Force and Motion Review
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• Sir Isaac Newton
• 1642 1727
• Laws of Motion

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• Potential
• Energy
• stored energy

Kinetic Energy Energy in motion
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• Force
• A push or pull
• Forces cause objects to
• Speed up
• Slow down
• Change direction
• Stay on the ground

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• Balanced Forces
• no movement

Unbalanced Forces movement
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• Inertia
• keep on doing what its doing
• At rest- stay at rest
• In motion stay in motion
• until another force acts on it!

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• 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

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• Gravity
• Gravity is a force that attracts objects
  together.
• The larger an objects 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

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• 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

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• 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

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• Simple Machines
• Help increase your force to make work easier.

Force and Motion Jeopardy
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