Jack is using a hammer for removing a nail from a piece of wood. Which simple machine is he using?
A
Pulley
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B
Screw
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C
Lever
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D
Wheel and axle
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Solution
The correct option is C Lever He is using a lever for removing a nail. When pulling a nail, the nail is the load, the head of the hammer is the fulcrum, and the effort is at the other end of the handle.