Newton

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Newtons Laws of Motion
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Sir Isaac Newton was a famous mathematician and
scientist in the 1600s.
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This is the way most people remember him.
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• When most people think of Isaac Newton, they
  think of him sitting under an apple tree
  observing an apple fall to the ground. When he
  saw the apple fall, Newton began to think about a
  specific kind of motiongravity.

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Isaac Newton also understood other ways objects
move. He came up with 3 rules or laws.
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Newtons 1st Law of Motion

• The First Law states that an object that is
  not being pushed or pulled by some force will
  stay still, or will keep moving in a straight
  line at a steady speed. This law is often called
  "the law of inertia". Inertia means that all
  objects resist any change in motion.

This is why people wear seat belts. Without a
seat belt your body keeps moving when the car
stops.
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Newtons 1st Law of Motion

• This is why a rocket ship can keep going
  through space without a motor after blast off.

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Newtons 1st Law of Motion

• This is why you can pull the tablecloth out
  from under the dishes without the dishes moving.
  The dishes will remain at rest unless they are
  pushed or pulled.

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Newtons 1st Law of Motion

• This is why Sean was able to hit one penny
  from the middle of the stack without the others
  moving.
• (An object will stay still unless a force
  gives it a push or pull.)

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• This is also why if the same force is applied
  to two objects, one with more mass, the object
  with the greater mass will be harder to move.
  Objects with smaller mass have less inertia.

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Newtons 2nd Law of Motion

• The Second Law explains how a force acts on an
  object.
• Here are the rules

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Newtons 2nd Law of Motionin More Detail

• An object accelerates in the direction the
  force is moving it.

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Newtons 2nd Law of Motionin More Detail

• The harder the force behind the push the
  faster the object will move.

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Everyone knows that heavier objects require more
force to move the same distance as lighter
objects.
                                                              
                                                                       

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• truck 1
• truck 2
• If both truck 1 and truck 2 are traveling at
  the same speed and apply brakes with the same
  force, truck 2 will take longer to stop because
  it has more mass. With more mass the truck has a
  greater push.

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Newtons 3rd Law of Motion

• The Third Law states that if an object is
  pushed or pulled, it will push or pull equally in
  the opposite direction.

When this boy hits the pool, he is pushing into
the water. An equal but opposite force will be a
big splash.
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• http//www.bbc.co.uk/schools/scienceclips/ages/6_7
  /forces_movement_fs.shtml
• http//teachertech.rice.edu/Participants/louviere/
  Newton/law3.html

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Experiments

• http//www.sciencespot.net/Media/newtonlab.pdf