Which of following statements are correc...

Which of following statements are correct ? l (a) Centre of mass of a body always coincides with the centre of gravity of the body
(b) Central of mass of a body is the point at which the total garvitational torque on the body is zero
(c ) Couple on a body produces both trasnlational and rotation motion in a body
(d) Mechinical advantage greater than one means that small efforts can be used to lift a large load

A

(c ) and (d)

B

(b) and (d)

C

(a) and (b)

D

(b) and (c )

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The correct Answer is:

B

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