# Calculating Torque?

Calculating Torque??

i wonder how would i calculate the amount of torque required to give a rectangular piece of marble, an angular velocity of pi radians/second given the angular moment of inertia of that slab.

The bearing supports holds a coefficient of friction of 0.2 and the shaft diameter is 20mm. the angular moment of inertia of the slab about the rotation axis is 200 kg-m2. The distance between supports is 1 meter and the slab is in the center of the shaft.

Regards

tiny-tim
Homework Helper
hi mawais15!
i wonder how would i calculate the amount of torque required to give a rectangular piece of marble, an angular velocity of pi radians/second given the angular moment of inertia of that slab.

torque gives you angular acceleration (τ = Iα), not angular velocity …

once you find the angular acceleration, you can get the angular velocity using the standard constant acceleration equations

hi mawais15!

torque gives you angular acceleration (τ = Iα), not angular velocity …

once you find the angular acceleration, you can get the angular velocity using the standard constant acceleration equations

how about incorporating the bearing friction to maintain the desired angular velocity?

tiny-tim