The water-park ride consists of an 800-lb sledwhich slides from rest down the incline and...

The water-park ride consists of an 800-lb sledwhich slides from rest down the incline and then into the pool. If the frictional resistance on the incline is Fr = 30 lb, and in the pool for a short distance Fr = 80 lb, determine how fast the sled is traveling when s = 5 ft.