Pole-vaulting is an athletic event where a person uses a long, flexible pole as an aid to leap over a bar (see picture below). The athlete runs along a straight path while holding the flexible pole. When the athlete approaches the bar, they plant one end of the pole into a "pit". The pole bends, and then propels the athlete upwards. At the peak of the jump the athlete swings over the bar and lands on a padded mat. Pole Ground level Metal Wooden plain box Take-Off BoxA) An athlete with a mass of 68.0 kg is carrying a pole which has a mass of 15.0 kg. The athlete starts his jump by accelerating from rest to a top speed of 9.862 mfs over a horizontal distance of 50.0 m. What is the magnitude of the athlete's acceleration during the approach? Answer in the space provided. Show all work done to nd your answer including any formulas you use and all relevant units in your calculations. B) What is the kinetic energy of the athlete when he is at his maximum speed? Remember, the athlete is still holding the vaulting pole. when the pole springs back, it propels the vaulter into the air. This converts the energy stored in the pole (see previous question) into gravitational potential. Assuming 100%: of the energy stored in the pole is converted to gravitationai potential energy, nd the maximum height of the vaulter during the jump. NOTE: the vaulter is NOT holding the pole when they are in the air! A second polevaulter attempts the same jump. This second athlete has a mass of 62.0 kg and reaches a maximum height of 5.92 m during the jump. The athlete falls from the max height down onto a cushioned mat, which is laying at on the ground. The mat is 1.50 m thick. Assuming the mat compresses completely, and that the human body can only withstand a force of 2000 N, is the mat thick enough to enable the athlete to survive the fall? Suppose that the mat from the previous question was replaced by a flexible, elastic net which has a spring constant of 1500 Wm. The net is placed 3.00 m off the ground. A 62.0 kg athlete falls into the net from a max height of 5.92 m and lands in the net. Assuming that 100% of the kinetic energy is converted to elastic potential energy, determine how fast the athlete will be moving when the net has stretched 80 cm