Science Chapter 4: Work and Machines

22 terms by JGDenver

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Force exerted on an object that causes it to move


An inclined plane that moves

Wheel and axle

2 circular or cylindrical objects that are fastened together and rotate about a common axis


An inclined plane wrapped around a central cylinder to form a spiral


A grooved wheel around which is wrapped a rope, chain, or cable


A device that changes the amount of force exerted or the direction in which force is exerted


A rigid object that pivots about a fixed point

Output force

The force exerted on an object by a machine

Inclined plane

A flat surface with one end higher than the other


A unit of work to one newton-meter

Input force

The force exerted on a machine


The number of times the force exerted on a machine is multiplied by the machine


The percentage of the input work that is converted to output work



Wheel and axle

Bike wheel

Inclined Plane



Ropes on a flag pole



Compound machine

A device that contains 2 or more simple machines

body machines

Neck = Lever, Teeth = Wedges


Changes the amount of force exerted, the distance over which the force is exerted, and the direction in which the force is exerted

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