types:
inclined plane
a simple machine for elevating objects; consists of plane surface that makes an acute angle with the horizontal
lever
a simple machine that gives a mechanical advantage when given a fulcrum
block,
pulley,
pulley block,
pulley-block
a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
wheel
a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
balance,
balance wheel
a wheel that regulates the rate of movement in a machine; especially a wheel oscillating against the hairspring of a timepiece to regulate its beat
cartwheel
a wheel that has wooden spokes and a metal rim
car wheel
a wheel that has a tire and rim and hubcap; used to propel the car
driving wheel
a wheel that drives a motor vehicle (transforms torque into a tractive force)
fairlead
a pulley-block used to guide a rope forming part of a ship's rigging to avoid chafing
nosewheel
a wheel located under the nose of an airplane that is part of the plane's landing gear
pinwheel
a wheel that has numerous pins that are set at right angles to its rim
potter's wheel
a horizontal rotating wheel holding the clay being shaped by a potter
incline,
ramp
an inclined surface connecting two levels
ratchet wheel
toothed wheel held in place by a pawl or detent and turned by a lever
roller
a small wheel without spokes (as on a roller skate)
rowel
a small spiked wheel at the end of a spur
screw
a simple machine of the inclined-plane type consisting of a spirally threaded cylindrical rod that engages with a similarly threaded hole
wedge
something solid that is usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them