The pressure can get sufficiently large for very small holes.
you can calculate it using the capillary distance as in the 1st link. You have to calculate the pressure corresponding to certain height of water, as in a manometer.Eqn is in the second link. You need to go to nanoscale to get...
You're missing a term for the translation inertia of the sphere.Also T is wrong, it has to be angular acceleration. There's an easier way to do this analysis using total energy.Say initial position is at a height z0=0 so that deltaz is z. (z is vertical direction, deltaz=z-z0). At any z value...
The weight of the bar is irrelevant in this case, only the total weight matters, which is 200 lbs. When you're lifting free weights, some of the muscles are used just for balancing. When it's secured as in your case, you can use all the muscles in the single direction, you can push with more...