What you have told is unfortunately wrong.
After the motor has been turned off, the decelerating torque cannot be equal to what it was giving in steady state ( Just because there is no more supply to give the torque).
The decelerating torque is actually the frictional torque contributed by...
What will be the torque in a gear system after the motor get off. If so wat time it will take to stop.
For example say if a motor is operating at a torque of 0.075Nm with 6000 rpm and the output gear rotate with a torque of 25Nm with 18 rpm. After some time motor is not experiencing any...