Question

A screw jack is provided with long arms. why?​

Answer 1

Answer:

Thus more is the distance of point of application of force, more is the torque produced in the jack screw and thus more easily it rotates. Thus in order to produce more torque (or to rotate it easily), jack screw is provided with a long arm.

Explanation:

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Answer 2

Answer:

A jack screw is provided with a long arm to increase the perpendicular distance of the point of application of force from the axis of rotation, so that we can apply a small force to rotate the jack to lift the heavy load.

Explanation:

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