Question

If the torques on an object balance, then it follows that this object

       A) cannot be rotating.
       B) cannot be moving.
       C) cannot have any angular acceleration.
       D) net force also has to be zero.
       E) can be either rotating or moving but not both.

Answer 1

here,

when the torque on an object balance

means the net torque is zero

then using seccond law of motion

torque = I * alpha

where alpha is angular acceleration

alpha is also zero

the the object C) cannot have any angular acceleration.