Question #1 Nitro's initial vertical drop is 65.6 meters. If the mass of the train (including passengers) is 2100 kg, what is the change in potential energy of the train when it falls? (a) 300,000 J (b) 650,000 J (c) 1,000,000 J (d) 1,400,000 J (e) 1,900,000 J Question #2 The length that the train (m = 2100 kg) is pulled up the lift hill is 120 meters (in order to reach the hill? the 65.6 m vertical drop height). How much force did the lift chain apply to the train to pull it up (a) 500 N (b) 1500 N (c) 7500 N (d) 12,000 N (e) 18,000 N Question #3 If we assume that the velocity of the train is nearly zero right before it falls, then what is the velocity of the train at the bottom of this initial drop? (a) 5 m/s (b) 15 m/s (c) 25 m/s (d) 35 m/s (e) 45 m/s Question #4 Calculate the work done by gravity on a 60 kg. passenger during the initial drop. (a) 5,000 J (b) 10,000 J (c) 20,000 J (d) 30,000 J (e) 40,000 J Question #5 At the bottom of the first drop you experience approximately 4 g's (an acceleration of about 39.2 m/s2). What is the approximate radius of curvature at the bottom of the initial drop? (a) 11 m ( b) 22 m (c) 33 m (d) 44 m (e) 55 m Question #6 The train rises back up to 148 feet (45 meters) to get to the top of the next hill. According to the conservation of energy the velocity of the train at the top of this hill should be 20 m/s, but instead it is measured to be 15 m/s. An engineer inspects the track and finds that 10 meters of a flat section have been damaged and is no longer frictionless. What is the coefficient of friction over these 10 meters of track? (b) 0.6 (c) 0.7 (d) 0.8 (e) 0.9 (a) 0.5 4