Which one of the following is not a simple machine?
a. lever
b. pulley
c. hammer
d. inclined plane user: an input force of 20 newtons is applied to a lever at a distance of 2 meters from the fulcrum. an object 0.5 m away from the fulcrum (and on the other side) is lifted by the 20-n force. what is the output force?
a. 10 n
b. 20 n
c. 40 n
d. 80 n
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