1. A plow located on the front of a locomotive scoops up snow at the rate of 10 ft3 >s and stores it in the train. If the locomotive is traveling at a constant speed of 12 ft>s, determine the resistance to motion caused by the shoveling. The specific weight of snow is gs = 6 lb>ft3.
2. The boat has a mass of 180 kg and is traveling forward on a river with a constant velocity of 70 km>h, measured relative to the river. The river is flowing in the opposite direction at 5 km>h. If a tube is placed in the water, as shown, and it collects 40 kg of water in the boat in 80 s, determine the horizontal thrust T on the tube that is required to overcome the resistance due to the water collection and yet maintain the constant speed of the boat. rw = 1 Mg>m3.