The  wheel and axle is like a first class lever why?surprise

 May 9, 2017

A crane is a pulley because Cranes are large construction machines that are used to lift heavy objects. They have a pulley at the top of the pole that pulls up the load. Theaxle of a Ferris wheel is the part that the wheel spins around. It is in the center of the whole construction.

 May 9, 2017

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