Originally Posted by

**paulhr1976** hi i was wondering if osmeone could help with the following question?

The shear stress, t, across the wall of a thin walled tube is proportional to the applied torque, T, inversely proprortional to the square of the mean radius, r, of the tube and inversely proprtional to the thickness of the wall of the tube, t.

given the following dat, determine the law of proportionality:

t=30000kPa T= 3620 Nm

r= 80mm t=3mm

determine the shear stress, correct to three significant figures, across the wall of the tube when the applied torque is 5000Nm

thanks