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In a hand driven grinding machine, the handle is put _____________

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In a hand driven grinding machine, the handle is put _____________

(a) Perpendicular to the stone

(b) Near the circumference of the stone

(c) A few distances above the stone

(d) As far away from the stone

I have been asked this question by my college professor while I was bunking the class.

This question is from Significance of Rotational Motion in portion System of Particles and Rotational Motion of Engineering Physics I

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The correct answer is (b) Near the circumference of the stone

The best explanation: For a given force, torque can be increased if the perpendicular distance of the point of application of the force from the axis of rotation is increased. Hence the handle put near the circumference produces maximum torque.

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