Which simple machine is essentially an inclined plane wrapped in a spiral around a central cylinder?
APulley
BLever
CScrew
DWedge
Explanation
A screw is a simple machine formed by wrapping an inclined plane, or ramp, in a spiral around a central cylindrical shaft, allowing rotational force to be converted into a strong linear force along the screw’s axis. This design allows a screw to grip materials firmly and resist being pulled straight out, which is why screws are widely used as fasteners in construction and carpentry. The closer together the spiral threads are spaced, the greater the mechanical advantage, though more turns are needed to drive the screw in fully. Explore more Everyday Science MCQs on mcqstutor to keep practicing.

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