- #1
dkirov1
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Homework Statement
A person reaches a maximum height of 64 cm when jumping straight up from a crouched position. During the jump itself, the person's body from the knees up rises a distance of around 41 cm. To keep the calculations simple and yet get a reasonable result, assume that the entire body rises this much during the jump.
Part A: With what initial speed does the person leave the ground to reach a height of 64 cm?
Part B: In terms of this jumper's weight W , what force does the ground exert on him or her during the jump?
I figured out the first part, but I can't figure out the second part. :(
Also the answer to part B has to be a number? This is online homework and the answer is in the format:
F=_____W
Homework Equations
F=ma
The Attempt at a Solution
The velocity for part A was 3.5
I tried to figure out the time by using v=d/t, and got t=.117 seconds which seems wrong.
I tried to figure out the a so I used vf-vo/t=29.91?
and using 29.91 as a tried to figure it out. But I'm just stuck. I have no idea.