AP science unit 4

simple machine

a device that reduces the amount of effort needed to perform a task

lever

simple machine consisting of a bar free to pivot about a fixed point called a fulcrum

pulley

simple machine designed to support movement and change direction of transfer power

screw

simple machine that is an inclined plane wrapped around a cylinder

incline plane

simple machine consisting of a sloping surface used to raise heavy bodied

wedge

simple machine used to separate two object or portions of objects through the applications of force

wheel and axle

simple machine consisting of a round disc and long rod

potential energy

energy that is stored due to the interactions between objects

rube goldberg

chain reaction type machine or contraption deigned to perform a simple task

work

transfer of energy when a force is applied over a distance (J)

power

rate of which energy is converted measured in watts (W)

conservation of energy

states that energy cannot be created or destroyed