The torque of the wieght of any body about any vetical axis is zero. Is it always correct?

The torque of the weight of any body about any vertical axis is zero. Is it always correct?

The torque of the weight of any body about any vertical axis is zero. Is it always correct?

Moment of inertia of a body about an axis is 4kg-m^2 . The body is initially at rest and a torque of 8Nm starts acting on it along the same axis. Workdone by the torque in 20s , in joules is

The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it ?

The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it?

The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it ?

Net external torque on a system of particles about an axis is zero. Which of the following are compatible with it ?

The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it?