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Take Your Time. Rewind.

Ok, just from looking at the graph for my day entries, it has become so much more filling. But at the same time, it bothers me that there isn’t a gap where I am sleeping. Well there is, it just isn’t as big as I think it should be. Yes, Justin needs more sleep. No more Calc and Physics till 1 in the morning.

On the upside, the physics quiz is over. I think we did ok. I am going to try to recreate the problem here if I can just to check our work. Let’s try:
We have a mass (m1) sitting on top of a mass (m2). It is being held in place by a coeffecient of friction (u). The cart (m1 + m2) is sitting on a frictionless surface with an incline of d degrees. There is a string attached to a frictionless pully that is connecting the cart to a counter weight of m3. What is the largest possible m3 given the formentioned things that can be used to pull up without letting m1 fall off of m2.

We start with the formula for the max acceleration available to the cart.
OK, I think we did it wrong. We didn’t take into account the y vector. We needed to. I think, for total acceleration. Perhaps I am crazy.

Either way, I final answer ended up being m3 = (m1+m2)ucos(d). I think there is at least one other factor in there.. But oh well.

I just got word that JR Corps was a security hole again. Sometimes we just don’t keep our systems up2date. Oh well. The problem has been fixed I hope, so it shouldn’t happen anymore, not only that… I freed up some disk space.

Well, I’m going to see if I can’t write some code for the final touchups to the navigation system of the day before I have to leave for calc. Later

Time without thing 1: 33 hours, 45 minutes.

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