Definitions
A Push Or A Pull
Force
Mass
the amount of matter in a object
Law of Inertia
Law #1
a force caused by when two objects rub together
FRICTION
Give a example of Static Friction
Sitting in a chair
the total amount of force acting on a object
Net Force
Weight
the gravitational pull on an object at the planet
an object at rest will stay at rest an object in motion will stay in motion unless acted on by an unbalanced force
Law #1
What are 2 types of surfaces
Rough =) more friction
Smooth =) less friction
Give a example for rolling friction
roller skating
Can be in the same direction or opposite direction can cause a object moving have a net force *will be zero*
Unbalanced force
When gravity is the only force acting on a object
Free Fall
Acceleration depends on an objects mass and the net force acting on it
Law #2
What is one thing friction produces?
Heat or Wear down surfaces
Give a example of sliding friction
Sleding
a force that pulls objects towards each other
Gravity
Air resistance
fluid Friction with the air
If one object exerts a force on an other object then the second object exerts a force onto the first object that is but opposite in direction
law #3
What is another thing friction does?
Heat or Wears surface down?
Give a example of Fluid friction
Surfing
how far apart objects are from each other
Distance
Vacuum
a space free with air
for every action there is an equal but opposite reaction
law #3
Liquid or gas
Fluid