Question

A jack screw is provided with a long arm. Explain why?

April 3, 2024

Answer

A jack screw which is used to lift a heavy vehicle has a long arm so that less force is needed to rotate it to raise or lower the vehicle.

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A piece of stone tied at the end of a thread is whirled in a horizontal circle with uniform speed with the help of hand. Answer the following questions:
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(c) What is the direction of acceleration of stone at any instant?
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