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Force and Motion

8th grade Physical Science Force and Motion

TermDefinition
Acceleration the rate at which velocity changes over time.
Force A push or pull.
Inertia The resistance of an object to a change in its speed and/or direction.
Joules The unit used to measure energy and work.
Velocity Speed with direction.
Work Force applied over a distance.
Friction The force that resists motion between two surfaces that are pressed together.
Simple Machines Six machines on which all other mechanical machines are based.
wheel and axle A simple machine made of a wheel attached to an axle.
screw An inclined plane wrapped around a cylinder or cone to form a spiral.
pulley A wheel with a grooved rim and a rope or cable that rides in the groove.
lever A bar that rotates around a fixed point called a fulcrum.
inclined plane A sloping surface that helps move objects from one level to another level.
wedge A movable inclined plane with a thick end and a thin end. Used for cut, split, pierce objects, or hold objects together.
Created by: lcrowe
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