Recent content by Reisen

I've got a homework problem that starts like so: Assume that Young's Modulus is 1.5 x 10^10 N/m^2 for bone and that the bone will fracture if stress greater than 1.5 x 10^8 N/m^2 is imposed on it. If the effective diameter of the bone is 2.5cm, what is the maximum force that can be imposed...

Ah, yes. Thank you. I was getting the real world all confused with the perfect world of elementary physics :D That answers my question, thank you. -Reisen

Your standard first-post-pleading-for-help here :) This doesn't make sense: Say you've got a setup like in picture 1 (floor is frictionless) If the F readout on the scale is 18N, and the box is 5kg and F=ma, then 18N/5kg = 3.6m/s^2 = a, right? Okay... Now, if the velocity is...