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13 Cards in this Set

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  • Back
weight
the measure of the pull of gravity on an object
mass
the amount of matter (stuff) in an object. More mass=more weight
balanced force
Equal forces that act on an object in opposite direction
unbalanced force
changes the speed or direction of an object
gravity
the force that pulls objects towards the center of the earth.
Inertia
the tendency of an object to resist in any change in its motion
speed
the distance an object travels in a unit of time
acceleration
Any change in the speed or direction of an object
Newtons 1st law
An object in motion will remain in motion and an object at rest will remain at rest unless acted by an outside force.
newtons 2nd law
F=Mass X acceleration. The acceleration of an object depends on its mass & the force acting on it
Newtons 3rd Law
For every action there is an equal and opposite reaction
Force
A push or pull on an object
Friction
A force that oppresses the motion