High School Dude
Hi, my name is High School Dude, and i have a delemna. I need to find out how muscles exhibit force, though i do not study physics. I need to know what kind of force is applied to say jumping. Any help would be much appreciated.
El_Machinae
jumping is easy, because gravity is a consitent force and is highly predictable.

Since you can't add force once you leave the ground (in a jump) then the amount of force you apply while jumping is just a function of the height you jump and your weight.

Of course, while jumping (but before you leave the ground) you apply a various number of instantaneous forces (so your thighs compress a different force than you calves), but let's not worry about that.

Basically, calculate how much force is required to push X lbs Y feet into the air, and that's how much force you're applying.
High School Dude
Yeah, but what if i had a given height and trajectory of the jump (large jump), but i had no force or weight measurements because the weight has to be relative (muscle mass) to the force needed to jump. In other words, the weight has to be able to exert the force needed to lift itself a large distance.
T-cell
High School Dude,

Stick to body weight and force required to lift x weight , y distance.

Stay away from
QUOTE
(muscle mass)
or any other human biological aspects to calculate force output required. I could give you a dozen physiological and anatomical components one would have to factor according to the individual assigned to the equation. None of them, I or any others on this site would be able to accurately calculate or even acquire with all the anthropometric measurements necessary.

Many of the forum members (the physicists unlike myself) will gladly and easily provide you with the simple answer if you stick to the generic based question.
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