# Can someone explain the physics of a standing jump?

I would like to use something like a kinematic equation to know where the person will be in the jump at a given time. However since I think acceleration is not constant because of the jump force it doesn't seem I can use that equation.

It seems like this is a summation of forces with a kinematic equation but it has been a few years since I've had to do this kind of thing. Any help is greatly appreciated!

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