Newton

1
Newtons Laws

• An object at rest will stay at rest. An object in
  motion stays in motion with the same speed and
  direction unless acted upon by an unbalanced
  force.
• The acceleration of an object is dependent upon
  two variables. The net force acting upon the
  object and the mass of the object.
• For every action there is an equal and opposite
  reaction.

Sir Isaac Newton
2
Newtons First Law
An object at rest will stay at rest. An object in
motion stays in motion with the same speed and
direction unless acted upon by an unbalanced
force.
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3
Newtons Second Law
Force Acceleration Mass
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4
Newtons Third Law
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5
Law application
Bob the Beaker hit a rock while moving on his
skateboard. He tumbled and broke. Which law of
physics applies to this situation?
Newtons 1st Law
Newtons 2nd Law
Newtons 3rd Law
6
Why Newtons 1st Law?

• Bob the beaker is traveling 10 miles an hour on
  his skateboard and being in motion, he wants to
  stay in motion. When his skateboard stops due to
  the rock, Bob still wants to carry on the motion
  and he falls.
• An object in motion stays in motion with the same
  speed and direction unless acted upon by
  an unbalanced force.

7
Law application
During the 9th inning of the World Series, New
York Yankee Roger Clemens pitches the ball and
Atlanta Brave Kevin Millwood hits the ball out of
the park for a homerun. Which law of physics
applies to this situation?
Newtons 1st Law
Newtons 2nd Law
Newtons 3rd Law
8
Why Newtons 3rd Law?

• Clemmons baseball forces Millwoods bat to the
  right (an action) when they meet the bat forces
  the ball to the left (the reaction).
• For every action there is an equal and opposite
  reaction.

9
Law application
You are helping rearrange your living room
furniture. You push with all you strength and
easily move the chair to its new spot in the
corner. You then push with all you might to move
the couch to its new spot but it barely moves.
Which law of physics applies to this situation?
Newtons 1st Law
Newtons 2nd Law
Newtons 3rd Law
10
Why Newtons 2nd law?

• Newtons 2nd law of motion states that
  acceleration depends on two factors force
  mass.
• Acceleration Force / Mass.
• This means the mass of an object has a negative
  effect on acceleration. Simply put if an object
  has more mass it will be harder to move.
• (force has a positive relationship more force
  more acceleration)