NEET2017Physics-Mechanics
NEET 2017 Physics Center of Mass and Torque Multiple Correct Question
Type: Multiple Correct-conceptual-Medium-Class 11
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) 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
(B) and (D)
B
(A) and (B)
C
(B) and (C)
D
(D)
Correct Answer
Option D
Detailed Explanation
Statement (B) is correct as the center of mass is the point where the gravitational torque is zero. Statement (D) is correct as a mechanical advantage greater than one allows lifting a larger load with less effort.
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