Machines Science
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Work equals?
force X distance

Force equals?
Work/distance

Distance equals?
work/force

Work is measured in?
Joule

joule?
What work is measured in

Power?
The rate at which work is done

The rate at which work is done?
power



1 horsepower equals?
746 watts

746 watts equals?
1 horsepower

What is a simple machine?
A device that helps make work easier to perform.

A device that helps make work easier to perform?
A simple machine.

Simple machines accomplish?
 A change in direction
 An increase in magnitude or force
 An increase in distance or speed or force

Machines CANT do what?
They can't increase the amount of work you do!!!!!!!!!!!!!!!!!!!!

Work input?
Work done ON machine. (the force and distance YOU apply to a machine)

Work done ON machine (the force and distance YOU apply to a machine)
Work input

Work output?
Work done BY the machine (the force and distance the machine does)

Work done BY a machine (the force and distance the MACHINE does)
Work output

Mechanical advantage?
The number that tells how many times a machine multiplies force

The number that tells how many times a machine multiplies force?
Mechanical advantage.

Mechanical Advantage Equation?
output force / input force

output force / input force
Mechanical advantage equation

Mechanical efficiency?
Compares machines work output with it's work input

Compares machines work output with it's work input
Mechanical efficiency

Mechanical efficiency equation?
(work output / work input) x 100%

(work output / work input) x 100%
Mechanical efficiency equation