|
|
|
|
Work |
the transfer of energy that occurs when a force makes an object move. |
|
power |
is the amount of work done in one second |
|
machine |
a device that makes doing work easier |
|
input force |
the force that is applied to the machine |
|
output force |
the force applied by the machine |
|
mechanical advantage |
The ratio of the output force to the input force |
|
efficiency |
the measure of how much of the work put into a machine is changed into useful output work by the machine |
|
pulley |
is a groovede wheel with a rope , chain , or cable run-ing along the grove |
|
wheel and axel |
simple machince consisting of a shaft or axel attached to the center of a larger wheel so that the wheel and axel roatates together |
|
inclined plane |
a sloping surface that reduces the amount of force required to do work |
|
screw |
is an inclined plane wrapped in a spiral aroound a cylindrical post |
|
wedge |
an inclined plane with one or two sloping sides .. |
|
compound machine |
two or more simplle machines that operate together |
