Centre of Mass vs Centre of Gravity – Rankers Physics
Topic: Center of Mass , Momentum and Collision
Subtopic: Calculation of Center of Mass

Centre of Mass vs Centre of Gravity

Given below are two statements:
Statement I: Centre of mass of any object always coincide with centre of gravity.
Statement II: Centre of gravity is the point where total gravitational torque on the body is zero.
In the light of the above statements, choose the most appropriate answer from the options given below.
Both statements I and II are correct
Both statements I and II are incorrect
Statement I is correct but II is incorrect
Statement I is incorrect but II is correct

Solution:

Statement I is false because the center of mass and center of gravity only coincide in a uniform gravitational field. Statement II is true because the center of gravity is defined as the point about which the net gravitational torque is zero.

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