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Simple Machines
Term | Definition |
---|---|
Fulcrum | the pivot point around which a lever can turn |
Mechanical Advantage | the ratio of the force produced by a machine to the force applied to it |
Kinetic energy | the energy an object has due to its motion |
Potential energy | the amount of energy that is stored in an object; energy that an object has because of its position relative to other objects |
Simple machine | a simple device without moving parts that changes the magnitude or direction of a force |
work | the change in a system's kinetic energy due to being acted on by a force |
lever | a simple machine consisting of a solid bar that rotates around a pivot point; used to lift objects |
pulley | a simple machine consisting of a rope that is wrapped around a wheel; can be used to help lift heavy objects |
inclined plane | an object with a flat, tilted surface; a simple machine that helps things roll or slide upward off of the ground |
power | the ratio of the amount of work done per unit of time, or the rate at which energy is transferred or transformed |
wedge | a simple machine that can be used to split objects apart, hold objects in place, or lift objects from the ground; consists of two inclined planes joined together |
screw | a simple machine made of a shaft with grooves that wrap around it going from top to bottom |
wheel | one of the simple machines |
compound machine | 2 simple machines combined to create a more complex machine, like scissors |
wheel and axle | wheel attached to an axle so that these two parts rotate together in which a force is transferred from one to the other |