17 terms

Kaufman/Guthrie Key Science words Chapter 2

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Force
A push or pull exerted on an object.
Newton
A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per son per second.
Net force
The overall force on a n object when all individual forces acting on it are added together.
Sliding Friction
Friction that occurs when one solid surface SLIDES over another.
Static Friction
Friction that acts between objects that are NOT MOVING.
Fluid Friction
Friction that occurs as an object moves through a FLUID.
Rolling Friction
Friction that occurs when an object ROLLS over a surface.
Gravity
The attractive force between objects; the force that moves objects downhill.
Mass
The amount of matter in an object.
Weight
A measure of the force of gravity acting on an object
Inertia
The tendency of an object to resist a change in motion
Momentum
The product of an object's mass and velocity
Law of Conservation of Momentum
The rule that in the absence of outside forces the total momentum of objects that interact does not change
Free Fall
The motion of a falling object when the only force acting on it is gravity
Satellite
Any object that orbits around another object in space
Centripetal Force
A force that causes an object to move in a circle
Friction
The force that two surfaces exert on each other when they rub against each other.
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