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Homework Statement
A 55 kg woman jumps to the floor from a height of 1.5 m.
If her body comes to rest during a time interval of 8.00 * 10^-3 seconds, what is the force of the floor on her feet?
Homework Equations
Unit conversion and
g = 9.8m.s^2 ~ 10 m/s^2
The Attempt at a Solution
The way I understand it, she is at rest, so
Fnet = 0
Fnormal - Fg = 0
Fnormal = Fg = mg = 550 N
This is wrong, and the answer is around 300 N. Why is this?