# Shared Flashcard Set

## Details

Vocab
N/A
16
Physics
01/09/2014

Term
 efficiency
Definition
 in a machine, the ratio of useful energy out-put to total energy input.
Term
 energy
Definition
 the property of an object or a system that enables it to do work.
Term
 fulcrum
Definition
 the pivot point of a lever.
Term
 joule
Definition
 the SI unit of work and all other forms of energy. one joule of work is done when a force of one newton is exerted on an object moved one meter in the direction of the force.
Term
 kinetic energy
Definition
 energy of motion, equal to half the mass multiplied the speed squared.
Term
 law of conservation of energy
Definition
 energy cannot be created nor destroyed. it may be transformed from one form to another.
Term
 lever
Definition
 a simple machine made of a bar that turns to a fixed point.
Term
 machine
Definition
 a device for increasing a force or simply changing the direction of the force.
Term
Definition
 the ratio of output force to input force for a machine.
Term
 mechanical energy
Definition
 the energy due to the position or the movement of something .
Term
 potential energy
Definition
 energy of position usually related to relative position of two things.
Term
 power
Definition
 rate at which work is done or energy is transformed.
Term
 pulley
Definition
 a type of lever that is a wheel with a groove in its rim which is used to change the direction of force exerted by rope or cable.
Term
 watt
Definition
 the SI unit of power, one watt expended when one joule is done.
Term
 work
Definition
 the product of force of an object that is moved.
Term
 work-energy theorem
Definition
 theorem states that whenever work is done energy changes.
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