science test 1

exertion of a force on an object that produces movement in the direction of the force

• input force

• power

• work

• simple machine

the rate at which work is being done; measured in watts

• input force

• power

• output force

• friction

the force exerted on a machine

• input force

• output force

• joule

• work

the force exerted by a machine

• work

• input force

• power

• output force

the number of times the input force is multiplied by a machine

• power

• mechanical advantage

• efficiency

• work

this equals the output work divided by the input work. It is expressed as a percentage.

• power

• efficiency

• friction

• input force

a machine that does work with only one movement.

example: inclined plane, wedge, screw, lever, wheel and axle, pulley

• ideal machine

• machine

• simple machine

• fulcrum

machine made up of a combination of two or more simple machines

• power

• simple machine

• ideal machine

• compound machine

simple machine that is a flat surface, or ramp

• screw

• wheel and axle

• inclined plane

• wedge

A simple machine consisting of an inclined plane that moves; it can have one or two sloping sides

• screw

• wedge

• inclined plane

• pulley