Science Ch5 Voc Flashcards
Transfer of energy that occurs when a force makes an object move
Work
Amount of work done, or amount of energy transferred, divided by the time required to do the work or transfer of energy, measured in watts
Power
Device that makes doing work easier by increasing the force applied to an object
Machine
The force that is applied to the machine
F in
Input force
The force applied by the machine
F out
Output force
Ratio of the output force exerted by a machine to the input force applied to the machine
Mechanical advantage
Ratio of the output work done by the machine to the in
It work done on the machine expressed as a percentage
Efficientcy
Machine that does work with only one movement, lever, pulls, wheel and axle, incline plane, screw, wedge
Simple machine
Simple machine that consists of a grooved wheel with a rope, chain or cable running along the groove
Pulley
Simple machine that consists of a shaft or axle attached to the center of a larger wheel
Wheel and axle
Simple machine that consists of a sloping surface such as a ramp that reduces the amount of force needed to lift something by increasing the distance over which the force is applied
Incline plane
Simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post
Screw
Simple machine that is an inclined plane with 1 or 2 sloping sides
Wedge
Machine that is a combination of 2 or more simple machines
Compound machine
Simple machine consisting of a bar free to pivot about a fixed point called the fulcrum
Lever
