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Forces : Turning Forces and Uniform Circular Motion — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsForces : Turning Forces and Uniform Circular Motion2 Marks
Question
Explain the following
(a) Why does a jack screw provided with a long arm?
(b) It is easier to turn a steering wheel of larger diameter than a steering wheel of small diameter.
✓

Answer

(a) The long arm of the jackscrew acts as the perpendicular distance between the line of action of force and the axis of rotation. This generates maximum moment of force for a minimum effort applied.
(b) Steering wheel of a larger diameter ensures maximum perpendicular distance between the line of action of force and the axis of rotation. This helps in turning the steering wheel with minimum effort.

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