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JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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Which of the following statements are correct:

(a) Centre of mass of a body always coincides with the centre of gravity of the body.

(b) A couple on a body produce pure rotational motion in a body.

(c) A couple on a body produce both translational and rotational motion in a body.

(d) Mechanical advantage greater than one means that small effort can be used to lift a large load.

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Correct option: B

b and d

Option B (b and d) is correct because a couple produces pure rotational motion, and a mechanical advantage greater than one allows a small effort to lift a large load.

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