Chap 14 Science Vocab

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When a force causes an object to move in the same direction that the force is applied

Work
The rate at which work is done

Power
The force you apply on an object

Input Force
The work that the machine does

Output force
The ratio of the output force to the input force and can be calculated from this equation

Mechanical Advantage
Ratio of the output work to the input work

Efficiency
A machine that does work with only one movement

Simple Machine
A machine made of a combination of similiar machines

Compound Machines
A flat, sloped surface

Inclined plane
An inclined plane that moves

Wedge
Any rigid rod or plank that pivots or rotates about a point

Lever
Two circular objects of different sizes that are attached in such a way that they rotate together.

Wheel and axle
A grooved wheel with a rope or cable wrapped over it

Pulley