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19 terms

Simple Machines

Third grade
STUDY
PLAY
The six simple machines
inclined plane, screw, wheel and axle, wedge, pulley, lever
inclined plane
It is simply a straight slanted surface.
screw
An inclined plane wrapped around a cylinder is another type of simple machine called the screw.
wedge
two inclined planes joined together back to back
lever
a rigid bar that rests on a fulcrum (a fixed point.)
There are ___ classes of levers
There are 3 classes of levers
Pulley
A pulley is a rope, belt, or chain wrapped around a grooved wheel.
wheel and axle
a simple machine made up of two circular objects of different size.
What part of a wheel and axle must move together to be a simple machine?
The wheel and axle must move together to be a simple machine.
This simple machine is used to drive things apart
A Wedge
This simple machine is a wheel that is used with a cord or rope
Pulley
This simple machine is a wheel that has a rod attached to it.
Wheel and Axle
This simple machine is a bar that pivots or turns on a fixed point called a fulcrum.
Lever
This simple machine is a flat, slanted surface that works like a ramp.
inclined plane
This is what the fixed point of a lever is called
The fulcrum
It is easier to move a load when the fulcrum is (closer, farther away) from the load.
farther away
(Force, Work) is the push or pull
Force
(Force, Work) is the movement caused by push and pull on an object.
Work
These devices make work easier for people allowing us to push or pull over increased distances. There are no motors attached.
Simple machines