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Support for Chapter 4


Force times distance


Unit of measure for work, one Newton Meter


Amount of work done per unit of time


Unit of measure for power, joule per second

input force

amount of force applied to a machine

output force

amount of force produced by a machine

input work

amount of work applied to a machine

output work

amount of work output by a machine

mechanical advantage

output force divided by input force


(output work divided by input work) times 100

inclined plane

a flat sloped surface, ramp


a device that is thick at one end and tapers to a point,knife


an inclined plane wrapped around a cylinder, screw


a rigid bar that that pivots around a fulcrum, crowbar

wheel and axel

two circular objects joined together, the larger is the wheel, the smaller is the axel, door knob, screw driver


a groved wheel and a rope,

compound machine

a machine that uses two or more simple machines

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