The trailer in Problem 21.94. not including its wheels and axle, weighs 1000 lb. The sprin...

The trailer in Problem 21.94. not including its wheels and axle, weighs 1000 lb. The spring constant of its suspension is k = 2400 lb/ft :and the damping coefficient due to its shock absorbers is c = 200 lb-s/ft. The road surface parameters are h = 2 in and λ = 8ft. The trailer ‘s horizontal velocity is v = 6 mi/h. Determine the magnitude of the trailer’s vertical steady-state vibration relative to the road surface, (a) neglecting the damping due to the shock absorbers and (b) not neglecting the damping.