The above image shows Yelena Isinbayeva (64.1 kg) at a point in her vault where the pole is maximally deflected (Δx = 1.63 m). The pole has a bending stiffness of 1091 N/m and behaves according to Hooke's Law. At this point in the vault, her vertical velocity is 3.25 m/s and she is 2.48 m above the ground.
How much work was done be gravity during the time the vaulter went from 2.48 m above the ground to her peak height?
work done = change in energy
Hooke's Law: Fs=kΔx
Total energy = KE+PE+SE
I have already calculated the following from previous questions
Work done on the pole = 1449.34J
SE stored in the pole = 1449.34J
Force applied to the pole = 1778.33N
KE in vertical direction = 338.53J
PEg = 1559.48J
Peak height of her centre of mass = 5.32m
The Attempt at a Solution
These answers are all incorrect. I'm not sure how to approach this problem in another way.