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Simple Machines

Vocab Terms to know: Simple Machines

machine used to make work easier
work = force X distance
ramp inclined plane
fulcrum fixed point on a lever
force push or a pull; measured in newtons (N)
wedge an axe
pulley wheel and rope
baseball bat third class lever
ferris wheel wheel and axle
see saw first class lever
screw inclined plane wrapped around a bar to make spiral
balanced force two opposing forces are equal
friction a force that is opposite of a moving object, opposes motion
lubricants reduce friction, i.e., motor oil, wax, grease
rolling friction caused by wheels or ball bearings
ways to increase friction make surface rougher, add mass or pressure
ways to reduce friction make surface smoother, use lubricants, add ball bearings, etc.
Created by: mharlan