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lesson 3
Term | Definition |
---|---|
simple machines | do work using only one movement |
lever | a simple machine made up of a bar that pivots, or rotates, about a fixed point |
fulcrum | the point about which a lever is called |
wheel axel | an axle attached to the center of a wheel and both rotate together |
inclined plane | a flat, sloped surface |
wedge | a slopped surface that moves |
screw | an inclined plane wrapped around a cylinder |
pulley | a simple machine that is a grooved wheel with a rope or a cable wrapped around it |