A solid uniform sphere of mass 2.92 kg and diameter 78.6 cm spins about an axle through its senter. Starting with an angular velocity of 11.3 rev/s, it stops after turning through 90.7 rev with uniform acceleration. The magnitude of the net torque (in N m) acting on this sphere as it is slowing down is

A solid uniform sphere of mass 2.92 kg and diameter 78.6 cm spins about an axle through its senter. Starting with an angular velocity of 11.3 rev/s, it stops after turning through 90.7 rev with uniform acceleration. The magnitude of the net torque (in N m) acting on this sphere as it is slowing down is