Question

For a rotational equilibrium also known as a dynamic equilibrium has ___

• A. vector sum of torques is zero
• B. vector sum of velocities is zero
• C. scalar sum of torques is zero
• D. scalar sum of angular velocities is zero

Answer 1

The correct option is A

vector sum of torques is zero

To have a dynamic equilibrium like the one in rotational equilibrium we have to consider all the moments i.e. torques, and if their sum along with their directions comes out to be zero, then the system is in dynamic equilibrium.