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Gravity, Newton's Laws & Momentum
N/A
12
Science
Not Applicable
12/14/2011

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Term
weight
Definition
the measurement of the force of gravity on an object
Term
gravity
Definition
the force of attraction between two objects; gravity is what causes you to fall back to the ground when you jump
Term
inertia
Definition
the tendency of an object to resist change in motion or a change in rest
Term
momentum
Definition
the force or speed of an object
Term
law of universal gravitation
Definition
every object in the universe exerts a gravitational pull on other objects; objects with a higher mass have more gravitational pull than objects with a small mass, & objects that are closer together have more gravitational pull than objects that are farther away: so, objects with large masses that are close together have a lot of gravitational force
Term
air resistance
Definition
the upward force of air on an object
Term
terminal velocity
Definition
when the force of gravity equals the force of air resistance; the maximum velocity an object can reach
Term
free fall
Definition
when gravity is the only force acting on an object
Term
projectile motion
Definition
the curved path an object follows when thrown or projected towards the earth
Term
newton's first law of motion
Definition
an object at rest will stay at rest & an object in motion will stay in motion unless acted upon by an outside force
Term
newton's second law of motion
Definition
an object's force equals it's mass times it's acceleration
Term
newton's third law of motion
Definition
every action has an equal & opposite reaction; forces act in pairs
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