Simple Machine
by
guashao
Last updated 6 years ago
Discipline:
Science Subject:
Technology


Simple machine
Screw
Levers
Inclined planes
Wheel&Axle
Pulleys
Wedge
A screw is an inclined plane wrapped around a pole which holds things together or lifts materials.example:bolt,drills
A wheel with a rod, called an axle, through its center lifts or moves loads.example:roller,wheels
A lever is a stiff bar that rests on a support called a fulcrum which lifts or moves loads. examples: scrissors,switch
An inclined plane is a slanting surface connecting a lower level to a higher level.example:ramp,bath tub
A wedge is an object with at least one slanting side ending in a sharp edge, which cuts material apart.examples:saw,push pin
A pulley is a simple machine that uses grooved wheels and a rope to raise, lower or move a load.examples:shoelaces tighten,flag pole
First-class leversas in the seesaw, crowbar, and balance scale.
Second-class leversas a wheelbarrow
third-class leversas a hammer acts
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