An object is in motion when...
a change in position when compared to a reference point
any place or object that is used for comparisioin to another object helping determine if it is in motion.
The distance an object travels in a given period of time. SPPED= DISTANCE/TIME
Important when mesuring speed. Must include both a distance and time unit.
A speed mesurement that contains a direction
any change in an objects speed or direction.
a push or pull on an object
total force when two or more forces act together.
when two or more forces are working oppisite each other and are equal to 0.
If two or more forces are working in the same dirrection they are added together to get the net force
If two or more forces are working in oppisite directions, the are subtracted to get the net force
arrow used to show direction and strength of a force
Strength of a Vector
shown by lenght or thickness
physics law that states: Objects in motion or rest stay in motion or rest unless another force acts upon it.
More Mass = Moe Inertia
Amount of inertia in an object depends on it's mass
Newtons Laws of motion
Inertia Law, F = M x A, Rocket Law
F = M x A
The net force of an object is equal to its mass times acceleration
For every action n one dirrection, there is an equal reaction in the opposite dirrection.
force created when two surfaces are rubbed together.
Floor Burns are an example of
Friction producing heat
3 types of friction
Sliding, Rolling, Fluid
force that pulls all objects toward the center of the earth
Amount of friction between 2 substances depend on
Texture of the substances, how hard the two substances are rubbed together
measure of the amount of matter found in an object
measure of the pull of gravity
All objects create gravity
the larger the object, the more gravity produced.
Your weight changes on the moon because...
gravity is less on the moon.
A person always has the same mass because...
a person is always made of the same amount of matter
If there was no air friction...
all objects would fall at the same speed.