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Simple Machines
Vocab Terms to know: Simple Machines
Question | Answer |
---|---|
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. |