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# NMS PS 10

### SOL PS 10

TermDefinition
speed the distance an object travels per unit of time
velocity speed in a given direction
acceleration the rate at which velocity changes
Newton's first law of inertia an object at rest or in motion will stay at rest or in motion unless acted upon by an outside force
Newton's second law an object's acceleration depends on its mass and on the net force acting on it
Newton's third law for every action there is an equal but opposite reaction
work force exerted on an object that causes it to move
force a push or pull exerted on an object
mechanical advantage the number of times a machine increases the force exerted on it
efficiency the percentage of input work that is converted to output work
power the rate at which one form of energy is transferred into another
mass a measure of how much matter is in an object
weight a measure of the force of gravity acting on an object
friction the force that two surfaces exert on each other when they rub against each other
simple machines the most basic device for making work easier
inclined plane a simple machine that is a flat, sloped, surface
wedge a simple machine that is an inclined plane that moves
screw a simple machine that is an inclined plane wrapped around a central cylinder to form a spiral
lever a simple machine that consists of a rigid bar that pivots around a fixed point
fulcrum the fixed point around which a lever pivots
pulley a simple machine that consists of a grooved wheel with a rope or cable wrapped around it
wheel and axle a simple machine that consists of two attached circular or cylindrical objects that rotate about a common axis
compound machine a device that combines two or more simple machines
speed formula distance/time
force formula mass x acceleration
Created by: sford

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