Connecting Motion with Force

1
Connecting Motion with Force
2

• Force- a push or pull one body exerts on another.
• -Force does not always change velocity.
• Balanced forces- forces on an object that are
  equal in size and opposite in direction.
• Ex Tug of War.

3

• Unbalanced (Net) Force- forces on an object are
  not equal in size or direction.
• - This causes a change in the velocity of the
  object.

4

• Inertia- the tendency of an object to resist any
  changes in its motion.
• - velocity remains the same unless a force
  changes it.
• - The more mass an object has, the greater its
  inertia.
• Ex bowling ball vs. tennis ball

5

• Isaac Newtons 1st law of motion- A moving
  object will stay moving until a force stops it.
  An object at rest will stay at rest until a force
  moves it.
• - Also called the Law of Inertia.

6

• Friction- force that opposes motion between 2
  surfaces that are touching each other.
• Ex Friction is the force between you and the
  ground so you can walk.