Work

Front 1

Work

Back 1

transfers of energy that occurs when a force makes an object move; measured in joules.

Front 2

Power

Back 2

Amount of work done, or the amount of energy transferred, divided the time required to do the work or the transfer energy; measured in Watts (W).

Front 3

Machine

Back 3

device that makes doing work easier by increasing the force applied to an object, changing the direction of an applied force, or increasing the distance over which a force can be applied.

Front 4

Input Force

Back 4

The forced applied to a machine

Front 5

Output Force

Back 5

The forced applied by the machine.

Front 6

Mechanical Advantage

Back 6

ratio of the output force exerted by a machine to the input force applied to the machine

Front 7

Efficiency

Back 7

ratio of the output work done by the machine to the input work done on the machine

Front 8

Simple machine

Back 8

a machine that only does work with only one movement- lever, pulley, wheel and axle, inclined plane, screw and wedge.

Front 9

Lever

Back 9

simple machine consisting of a bar free to pivot about a fixed point called the fulcrum.

Front 10

Pulley

Back 10

simple machine that consists of a grooved wheel with a rope, chain or cable running along the groove; can either be fixed or movable.

Front 11

Wheel and Axle

Back 11

simple machine that consists of a shat or axle attached to the center of a larger wheel, so that the shaft and the wheel rotate together.

Front 12

Inclined Plane

Back 12

simple machine that consists of a sloping surface, such as a ramp, that reduces the amount of force needed to lift something by increasing the distance over which the force is applied.

Front 13

Screw

Back 13

simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post

Front 14

Wedge

Back 14

simple machine that is an inclined plane with one or two sloping sides.

Front 15

Compound Machine

Back 15

machine that is a combination of two or more simple machines.