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What is 1 + 3?
A force moving an object over a distance.
A push or a pull.
A device that makes work easier and that has few or no moving parts.
A simple machine that consists of a straight, slanted surface.
A simple machine made up of two inclined planes placed back to back.
A simple machine consisting of an inclined plane wrapped around a cylinder.
A simple machine made up of a bar that pivots at a fixed point called a fulcrum.
Wheel and axle
A simple machine that consists of two connected cylindrical objects of different diameters.
A simple machine that consists of a rope wrapped around a wheel.