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18 Cards in this Set

  • Front
  • Back

gravitational potential energy

energy stored in an object as the result of its vertical position or height; and as the result of the gravitational attraction of the Earth for the object

kinetic energy

energy that a body possesses by virtue of being in motion

mechanical energy

energy possessed by an object due to its motion or its position

conservation of energy

principle stating that the total energy of an isolated system remains constant regardless of changes within the system.


force that is applied to an object moves that object (W = F * d)


the rate at which work is done

simple machines

simple device for altering the magnitude or direction of a force


stiff bar that rests on a support called a fulcrum which lifts or moves loads


device with grooved wheels and a rope to raise, lower or move a load

incline plane

a slanting surface connecting a lower level to a higher level


an object with at least one slanting side ending in a sharp edge, which cuts material apart


inclined plane wrapped around a pole which holds things together or lifts materials

wheel & axle

a wheel with a rod, called an axle, through its center lifts or moves loads

mechanical advantage

the advantage gained by the use of a mechanism in transmitting force; specifically : the ratio of the force that performs the useful work of a machine to the force that is applied to the machine

effort (input) force

effort force is the force that moves an object over a distance by overcoming a resistance force; the formula for force is force = mass x acceleration or F = MA and is measured in newtons

resistance (output) force

the force which an effort force must overcome in order to do work on an object via a simple machine; measured in newtons or in pounds-force.

effort (input) distance

the distance over which a force was applied

resistance (output) distance

the distance of reactive force like friction is applied against the effort