1. Force: a push or a pull in a particular direction

2. Forces: -have a size (magnitude) - act in a particular direction -cause motion -balanced when all forces acting on an object are equal -measured in Newtons

3. Vectors
Arrows that show the size and direction of a force
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4. -What is happening in the picture?
-The forces shown above are: pushing or pulling?
-These forces are: working together/opposite forces?
-The forces are: balanced/unbalanced?
-Is there motion or not?

5. -The forces shown above are: pushing or pulling
-The forces shown above are: pushing or pulling? -These forces are: working together/opposite forces? -The forces are: balanced/unbalanced? -The stronger force is pulling to the right/left? -The weaker force is to the right/left? - Motion is to the right/left?

6. Different types of force:
friction
gravity
elastic force
contact force
centripetal force
muscular force
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7. Different Types of Forces
A force that resists the motion between two surfaces pressed together
The force of attraction between 2 masses- the strength depends on the masses
Friction
Gravity
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8. Different types of force:
Elastic force
Contact force
Associated with rubber bands, springs, and other materials that stretch easily when acted on by a force.
When one object pushes or pulls another object by touching it. The first object is applying contact force to the second object
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9. Different types of force:
Centripetal force
Muscular force
Any force that keeps an object moving in a circle
Any force that uses muscles to push/pull an object
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10. WHAT TYPE OF FORCES ARE INVOLVED?
Hula Hoop
Arm Wrestling
Bouncing on a trampoline
A dog sleeping on your lap
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