Posted by Anonymous on .
From what maximum height can a 61 kg person jump without breaking the lower leg bone of either leg? Ignore air resistance and assume the CM of the person moves a distance of 0.65 m from the standing to the seated position (that is, in breaking the fall). Assume the breaking strength (force per unit area) of bone is 170*10^6 N/m^2, and its smallest crosssectional area is 2.5*10^ 4 m^2. I really need help with this problem!!!

physics help please!!! 
bobpursley,
I will be happy to critique your work. Find the breaking force first.
Then breaking force*distance= KE of fall. 
physics help please!!! 
Anonymous,
ok so would the equation look like this: 170*10^6 *.65=mgh, which would be (61)(9.8)(h)
is this correct?