This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Two forces are applied as shown to a bracket support, where P is 880 lb and Q is 580 lb.

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.