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# Simple Machines

TermDefinition
simple machines machines that make work easier
lever an simple machine that is comprised of a rigid bar that rotates or pivots on a fixed point
fulcrum a fixed point where rotation or change in motion takes place on a lever
screw a simple machine that is comprised of an inclined plane wrapped around a cylinder
wedge a simple machine that is made of two inclined planes put together
wheel & axle a simple machine made up of two cylinders that rotate on the same axis
inclined plane a simple machine that is made up of a slanted surface
pulley a simple machine that is made of a rope fitted around a fixed wheel
gravity the force that pulls objects towards other objects
motion a change in an object's position as compared to objects around it
friction a force that slows or stops motion between two surfaces.
force a push that moves objects away or a pull that moves objects closer
speed and direction the two properties that describe the motion of an object
position an object's location or place
the object changes motion (starts or stops) What happens when you apply force to an object?
walking on the floor; holding a pencil How is friction useful to us?
Objects with greater mass have greater gravity and the Earth has a larger mass than the moon. How do we know Earth has greater gravity than the moon?
Give an example of each simple machine
Created by: cynthiamessina