Saturday, November 19, 2011

How do high jumpers use their knowledge of centre of gravity to increase their height of jump?

and approx. hoe heigh the high jump record could be the moon. on earth it is 2.45m.|||All three phases of the high jump require allowing for and using different physical forces. The approach involves accelerating the body along a curved path that leads up to the bar. At that point, the jumper is actually leaning away from the bar, allowing for the centrifugal force that will pull him or her into a vertical position for the jump.





The lift-off requires the jumper to overcome gravity by launching directly upwards while pushing against the ground. The greater the force applied to the ground, the greater the force that returns to the jumper.





Bar clearance requires careful management of the human center of gravity. The center of gravity is that point where an object balances perfectly. The force of gravity pulls down vertically and is concentrated at each object's center of gravity. For an object to remain balanced, the center of gravity must be on a vertical line with the point of suspension, above or below it. The ideal high jump position involves draping the body over the height of the crossbar at the peak of the jump.

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