Thursday, November 15, 2007

Physics followup.

As I thought, most of the test was relatively easy, except for a couple questions which I didn't quite make. One on recoil velocity of a 1500 kg canon set at 45 degrees firing a 10 kg ball at 200 m/s, another one about estimating the escape velocity of the moon from the escape velocity of the earth, knowing the mass and radius ratios, and, one about a crate with gravitational force of 40 N being pulled up a 5 m long incline plane (theta 37 degrees) where I had to find work of the frictional force (10 N). All three of those questions I had no idea how to solve. Otherwise, the rest of the test was things like, what are the units for joules (N*m), what is the position of a ball thrown straight up at so and so inital velocity at the highest point in the throw, converting revolutions/second into radians, and so on.

I think I will start going to discussion sessions from now on, there are things I don't know that I should, and I would rather do well in this class. My grandfather (who will not be named for security reasons) is a rather, well, I guess famous could be the correct word. Hes a rather famous physicist; his name is even on wikipedia. I have a sort of responsibility to do well, somewhat so I look good, but mostly so I can discuss things with him.

I wonder if my professor has ever heard of him...

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