Question 1 A 352 9 box slides up a 15.1 ramp at a speed of 4.90 m/s. Using conservation of energy and assuming the ramp is frictionless, how far along the ramp does the box slide before stopping? O 4.70 m 0 46.1 m 0 0.960 m 0 1.27 m Question 2 A 16300 kg train is reaching the end of the line. In order to slow down. the front of the train snags a cable that is attached to a spring. lfthe spring has a spring constant of 53800 N/m and the train's initial speed is 67.5 m/s, how much will the spring stretch to stop the train? 0 20.5m 0 37.2m 0 52.5m 0 4.52m Question 3 A billiard table in a bar is set up so that the numbered balls are heavier than the cue ball. A 160 g cue ball is shot at a speed of 3.91 m/s at a 520 g numbered ball at rest, resulting in a perfect elastic collision. What is the nal velocity of the cue ball after the collision? O 41.3 m/s 0 -2.07 m/s 0 -7.39 m/s 0 -3.48 m/s