1. Motion and Forces

2. Force- a push or pull applied to an object
Net Force-When two or more forces act on an object at the same time
Net Force Not Equal and favoring the left

3. Friction- the force that opposes the sliding motion of two touching surfaces
Type of Friction
Description
Example
Static
Friction in which two forces are not moving past one another.
Pushing a fridge across a floor
Sliding
Friction where two forces are moving past one another.
Sledding down a hill
Rolling
Friction between a rolling object and the surface it rolls on.
Skateboard moving on the ground
Fluid
Friction when object moves through fluid, meaning either a liquid or gas.
skydiving

4. Air Resistance- friction-like force that opposes motion of objects that move through air-depends on speed, size, and shape of an object

5. Newton’s 3 Laws of Motion

6. Newton’s 1st Law
An object in motion stays in motion or an object at rest stays at rest until acted upon by an unbalanced force.

9. Newton’s 2nd Law Acceleration is produced when a force acts on mass.
The greater the mass, the greater the amount of forced needed to accelerate the object.

11. Newton’s 3rd Law
For every action, there is an equal and opposite reaction.