Atrapezoidal channel has a bed width of 10 ft and side slope 2h: 1v. the channel is paved with smooth cement surface of n = 0.011. if the channel is laid on a slope of 0.0001 and carries a uniform flow of depth 4 ft, determine the discharge. ans. q = 183 f.

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.