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Question

how does a screw Jack work

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Solution

Dear student,
A screw is like an inclined plane spiraled on a cylindrical rod. We know an inclined plane can be used to lift objects. In the same way, a screw when pressed and rotated can be moved up or down. In a screw jack, the screw is rotated and the metal part resting on the thread (spiraled inclined plane on the cylindrical rod) moves up or down. Thus, a screw jack works on the principle of a screw. However, in screw jack, the screw only rotates but doesn't move up or down.
Regards

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