![]() ![]() So, in short the pole takes horizontal kinetic energy and stores it before using it to increase the gravitational potential energy of the vaulter. As the horizontal motion stops, the pole then releases this stored elastic energy as it pushes the vaulter upward. Olympic champion Neeraj Chopra continues to lead the javelin with his opening effort of 88. Tina Sutej was second with Sandi Morris in third. Where does the energy to bend this pole come from? It comes from the kinetic energy of the vaulter. World and Olympic champion Katie Moon won the womens pole vault with a second-time clearance at 4.81m, the best jump in the world this year. The more the pole bends, the greater the stored elastic potential energy. The flex in the pole is almost exactly like the compression of a slinky. As the runner plants the pole in the ground, the pole flexes. So how do you take this kinetic energy associated with the run and change it into energy needed to move vertically upward? The answer: You need to cheat. However, the vaulter is running horizontally. If the runner were moving vertically, this motion would carry the vaulter to the height as described previously. The pole vault is one of the 24 events that are contested as a part of the track and field disciple in the Olympics. To see the effect of the pole, consider the energy kinetic energy during the run. Both of these would mean that the vaulter wouldn’t have to run as fast.īut what about the pole? Isn’t the pole important? Of course you can’t pole vault without a pole. Instead, he or she can push on the pole to gain extra height. The other extra energy comes from right before position 2. If a person just stands still and jumps, they could probably increase the height of his or her center of mass by at least 0.5 meters. ![]() First, the vaulter doesn’t just run but instead runs and jumps. The vaulter can add extra energy to the system in two ways. ![]() That is why this calculation is mostly wrong. Just to get a feel for this speed, 9.9 m/s is about 22 mph. In this case, I can solve for the needed velocity beforehand and I get: I will use a change in height of maybe 5 meters. First, the height is the height of the bar, not the change in height for the center of mass. Let me now use this to find out how fast you must run to get to reach Bubka’s outdoor record of 6.14 meters. With this, I can re-write the work energy equation as: This means that there is no spring energy stored in either position. Womens Olympic pole vaulting began in 2000. And what about the spring potential energy? At both position 1 and 2, the pole is not bent. Mens Pole Vaulting has been a medal event at the Olympic Games since 1896. 2 just depends on the increase in height of the center of mass of the vaulter (as seen in the diagram). This means that the potential energy at position No. 2, the person isn’t moving (at least not too much), so there isn’t any kinetic energy.įor the gravitational potential energy, I can let the potential energy be zero at position No. 1, the person is running and has kinetic energy. If I assume there is no energy lost during this time (no work done on the system), then that part doesn’t matter. Notice that I skipped the whole “the pole bends” part. ![]()
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