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Simple Machines
Science
Term | Definition |
---|---|
lever | a bar that's free to piviot on a fixed point (fulcrum) |
pulley | a grooved wheel w/ rope or cable running along the groove |
inclined plane | a ramp |
wedge | inclined plane w/ 1+ sloping sides |
screw | inclined plane wrapped in a spiral around a cylindrical post |
wheel + axel | axle attached to center of a larger wheel so both rotate together |
lever MA | increase input force + changes direction of the force (all 3 way to make work easier) |
pulley MA | change direction |
inclined plane MA | increase distance; reduces amount of force required |
wedge MA | increases force |
screw MA | increase distance |
wheel + axle MA | increases force |
Simple Machine | a machine that does work w/ 1 movement of the machine |
Compound Machine | made of 2+ simple machines |
lever 1st class | fulcrum in middle |
lever 2nd class | output in middle |
lever 3rd class | input in middle |
lever 1st class MA | always change direction |
lever 2nd class MA | always increase force - no change of direction |
lever 3rd class MA | increase distance - don't typically change direction |
Machine | device that makes work easier |