| Which of the following statements are correct? [NEET-2017] |
| [a] Centre of mass of a body always coincides with the centre of gravity of the body. |
| [b] Centre of mass of a body is the point at which the total gravitational torque on the body is zero |
| [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. |
A) [c] and [d]
B) [b] and [d]
C) [a] and [b]
D) [b] and [c]
Correct Answer: B
Solution :
[b] Centre of mass may or may not coincide with centre of gravity.
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