29 terms · Odin's Physics Principle Flash Cards

An object is in motion when...

a change in position when compared to a reference point

Reference Point

any place or object that is used for comparisioin to another object helping determine if it is in motion.

Speed

The distance an object travels in a given period of time. SPPED= DISTANCE/TIME

Units

Important when mesuring speed. Must include both a distance and time unit.

Velocity

A speed mesurement that contains a direction

Acceleration

any change in an objects speed or direction.

Force

a push or pull on an object

Net Force

total force when two or more forces act together.

Balanced Forces

when two or more forces are working oppisite each other and are equal to 0.

Lifting Furniture

If two or more forces are working in the same dirrection they are added together to get the net force

Car Collisions

If two or more forces are working in oppisite directions, the are subtracted to get the net force

Vector

arrow used to show direction and strength of a force

Strength of a Vector

shown by lenght or thickness

Inertia

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

Rocket Law

For every action n one dirrection, there is an equal reaction in the opposite dirrection.

Friction

force created when two surfaces are rubbed together.

Floor Burns are an example of

Friction producing heat

3 types of friction

Sliding, Rolling, Fluid

Gravity

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

Mass

measure of the amount of matter found in an object

Weight

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.