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Physic's is Everywhere
Basketball
". . . basketball players . . . are gifted with great jumping ability. Leaping straight up, they seem to hang in the air in defiance of gravity. . . . Our perception of a longer hang time is one of many illusions we have about nature. (SCROLL) Jumping ability is best measured by a standing vertical jump." (Hewitt,Paul 22)
Hang Time
"Rising or falling time and vertical height is given by d = 1/2 gt2" (Hewitt, Paul 22)
" When you leap upward, jumping force is applied only as long as your feet are still in contact with the ground , The greater your launch speed and the higher the jump is. . . . whatever upward speed you attain immediately decreases at the steady rate of 10 m/s2. Maximum height is attained when your upward speed decreases to zero. . . . While airborne, no amount of leg or arm pumping . . . will change your hang time." (Hewitt, Paul 22). (SCROLL). When, " You begin falling, gaining speed at exactly the same rate, g. If you land as you took off, upright with legs extended, then time rising equals time falling. (Hewitt, Paul 22).
"Jumper's vertical speed at launch; it does not depend on horizontal speed. While airborne, the jumper's horizontal speed remains constant but the vertical speed undergoes acceleration." (Hewitt, Pual 22).
This video is the "2010 NBA Sprite Slam Dunk Contest." When Making a Slam Dunk the players use hang time to place the ball in the basket. Hang Time can also be used from Layups.
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By Karah C.
(SCROLL) Image by Girovagando. I choose this photo because it should a great example of hang time.
(SCROLL) Image by Welfl. I choose this picture because It shows hang time when doing a layup. This picture is an example of the lesson on the next page .
