ISAT Physics Review

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ISAT Physics Review

• Forces

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Newtons 1st Law

• Part 1 An object at rest stays at rest unless
  acted upon by unbalanced force
• Ex Parked car

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Unbalanced Force

• When the net force is not zero
• When object is being pushed or pulled in one
  direction.
• Ex Friction
• Ex Dropping ball

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Newtons 1st Law

• Part 2 An object moving stays moving unless
  acted upon by unbalanced force
• Ex Bumper Cars

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Inertia

• Newtons 1st law is also called the law of
  inertia
• Inertia is tendency of all object to resist any
  change in motion.

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Sources of Friction

• Edges of materials are always rough
• Rougher edges more friction

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Newtons 2nd Law

• The acceleration of an object depends on the mass
  of an object and the amount of force applied.
• a Force / mass

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• Force mass X acceleration
• As Force increases, so does mass or
• 
  acceleration

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Newtons 3rd Law

• For every action, there is an equal and opposite
  reaction.
• Forces act in pairs
• Ex Swimming

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• Forces act in pairs, but do not act on the same
  object.
• Objects have to be able to move.
• ExTug-a-rope contest