A brake-block shown below has a face width of 300 mm.
The mean coefficient of friction is 0.25. For an activating force of 400 N, the braking torque in Nm is
1
30
2
40
3
45
4
60
A brake-block shown below has a face width of 300 mm.
The mean coefficient of friction is 0.25. For an activating force of 400 N, the braking torque in Nm is