Question

If net external force on a body adds up to zero, which of the following statements are not necessarily true?

• A. Linear acceleration of the centre of mass is zero
• B. Angular acceleration of the body has to be zero
• C. Net External torque about any point need not be zero
• D. Angular momentum about any axis may not be conserved

Answer 1

The correct option is B

Angular acceleration of the body has to be zero

Angular acceleration of the body may not necessarily be zero about any axis about which net external torque is non-zero.