NEET · Physics · STD 11 - 6. system of particles and rotational motion
Which of the following statements are correct ? \((a)\) Centre of mass of a body always coincides with the centre of gravity of the body \((b)\) Central 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 rotation motion in a body \((d)\) Mechanical advantage greater than one means that small effort can be used to lift a large load
- A \((a)\) and \((b)\)
- B \((b)\) and \((c)\)
- C \((c)\) and \((d)\)
- D \((b)\) and \((d)\)
Answer & Solution
Correct Answer
(D) \((b)\) and \((d)\)
Step-by-step Solution
Detailed explanation
Centre of mass may lie on centre of gravity net torque of gravitational pull is zero about centre of mass. \(\text { Mechanical advantage }=\frac{\text { Load }}{\text { Effort }}>1\)
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