 | Term | Definition |
| |
work |
the quantity of energy transferred by a force when it is applied to a body and causes that body to move in the direction of the force |
| |
power |
the rate at which work is done, that is, how much work is done in a given amount of time |
| |
mechanical advantage |
the ratio between the output force and the input force in a machine |
| |
simple machines |
one of the six basic types of machines of which all other machines are composed |
| |
compound machines |
machines that combine two or more simple machines |
| |
potential energy |
the stored energy resulting from the relative positions of objects in a system |
| |
kinetic energy |
the energy that an object has because it is in motion |
| |
mechanical energy |
the sum of the potential energy and the kinetic energy in a system; the amount of work an object can do becaus of the object's kinetic and potential energies |
| |
efficiency |
a measure of how much useful work a machine can do |
