thx for the help
2007-02-11 12:57:15 · 12 answers · asked by navratna s 1 in Science & Mathematics ➔ Physics
When you land you put some sudden load on your knees back and legs if you bend your knees it tends to lessen the shock.
2007-02-11 13:00:29 · answer #1 · answered by burning brightly 7 · 0⤊ 0⤋
If you didn't bend the legs, the shock of hitting the floor would go up you legs and into your hip all at once. (Well, maybe it would take a 100th of a second.)
By bending the knees, you give the leg muscles more time to absorb the shock. That way, you don't bruise the bones.
2007-02-11 21:01:40 · answer #2 · answered by morningfoxnorth 6 · 0⤊ 0⤋
Gravity. If your legs do not bend, they would likely break. Yes that is true. Every square inch of air around you is 14 lb's, coupled with the speed that you're falling at from jumping off the table, the body compensates for all the pressure by bending at the joints to cushion the fall. That's why your feet will hurt after falling from heights.
2007-02-11 21:01:00 · answer #3 · answered by Jasper H 2 · 0⤊ 0⤋
You are letting the large muscles and springy tendons of your thighs and calves absorb the kinetic energy of your body that must be arrested by the impact.
You could severely damage your knees if you kept them locked for even a relatively low jump from a table to the floor.
2007-02-11 21:01:57 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Since this is the physics category I assume you want a physics answer and not a practical one.
The physics answer is that by bending your knees you decrease the rate of deceleration (or negative acceleration) when you land. That decreases the force which the floor exerts on your body (equal and opposite reaction, F=ma) which decreases the chance of injury and pain.
2007-02-11 21:07:03 · answer #5 · answered by Dave R 6 · 1⤊ 0⤋
To absorb the shock. If you landed with stiff legs the force would be uncomfortable or even cause injury.
2007-02-11 21:00:17 · answer #6 · answered by Anonymous · 1⤊ 0⤋
To absorb the shock. Kinda like cars' shockbreakers. If not, you'd injured you knee or your back.
2007-02-11 21:07:47 · answer #7 · answered by BryanB 4 · 0⤊ 0⤋
your knees bend because you body is absorbing the energy from the ground and the fall. by bendin the knees it makes impact less on the body and easier on everything!
2007-02-11 21:00:30 · answer #8 · answered by Sarah72 2 · 0⤊ 0⤋
It distributes the force of gravity across your body as equally as possible to minimize shock.
2007-02-11 21:10:03 · answer #9 · answered by Sereny 3 · 0⤊ 0⤋
My guess is that it is to help your legs to better absorb the shock so they won't be damaged.
2007-02-11 21:03:30 · answer #10 · answered by Max 6 · 0⤊ 0⤋