Which of the following is a false concept?

Question

A) For a uniform symmetric object, the center of gravity is at the center of the symmetry.

B) For an object on the surface of Earth, the center of gravity and the center of mass are the same point.

C) The center of mass of an object must lie within the object.

D) The center of gravity of an object may be thought of as the “balance point.”

Why is C) the correct answer?

Answer 1

Consider the example of a hoop of mass. Its center of mass is at the center of the hoop, which is not inside the mass of the hoop. In this case, the center of mass is not inside the body.