Physics

• How fast an object is going.
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How fast an object is going in a certain direction.

• Change in speed or direction.
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The tendency to resist change in motion.

The amount of matter in an object. A measure of inertia.

The difference between mass and weight is that weight is the measure of the force of gravity, so depending on where you are in the universe the numbers may be different.

• An object remains in motion or at rest unless acted on by an outside force.
• -gravity
• -friction

• force = mass x acceleration
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For every action, there is an opposite and equal reaction.]

Eg-A cue ball hits a billiards ball. (action force) The billiards ball moves (action force) but the cue ball stops (reaction force from billiards ball.)

• A push or pull.
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A force that resists motion between two objects.

Force pulling objects toward the center of the earth.

On earth, gravity is always 9.8 m/s².

• The amount of energy transferred by a force.
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Potential energy is the stored energy.

PE=mass x gravity x height

The energy of motion.

KE= 1/2 mv²