Do I really have to do this...

Hey everyone this is Keith and i guess its finally my turn to do the post thing.

SOOOO, lets see if my memory serve my correctly as I recap on what we did today.

We started class with a quiz, and here are the questions on the quiz.
1)Calculate the velocity of planet mar. sun m=2*10^30, Earth m=6*10^24, Mars m=6.4*10^23, and Mars circle the sun once every 1.88 Earth year. The answers is about 2.4*10^4 m/s
2)Calculate the velocity of the Earth. The answer is about 3*10^4 m/s
3)Calculate the velocity a satellite need i order to stay in a constance orbit 200km above the Mars Surface. The answer was B) about 1000m/s when rounded into one significant figure.
4)Draw the graph of how the Mars and Sun effects the velocity of the satellite. the answer could be a constant or it could look like a mini sin graph.

Then my memory got a little fuzzy and i don't recall if the Newton's Cradle or fun-doh cart came next. I guess the Newton's Cradle is next.
Professor Mason showed the class a Newton's Cradle and presented a question.
If one of the steel ball is replaced with a aluminum ball(less mass), will the system work or will it falls apart.
It turns out the system fail because the Newton"a cradle conserve both the momentum and kinetic energy. Steel ball have the mass or M and the aluminum ball have the mass of 1/3M. When the first steel ball hits the second steel ball, momentum and energy both are transfer perfectly. But when the steel ball hits the aluminum ball, 1/2mv^2 transfer to 1/2(1/3M)v^2. The equation fails and the system falls apart. So the mass have to be the same for the Newton's Cradle to work.

Professor Mason showed us a cart hitting a hard object comparing it hitting a softer object. The difference were that if it is against a hard object, force will increase very much in a very short amount of time. When the cart hits a softer object. The force is less and it is spread out in a long time interval.
Then professor showed us a sample of in an event of aircraft failure, what should you do????
-I choose to use a parachute which greatly increased the time interval before the impact.
-Edward chose the potatoe factory, which after he fall through the roof, the smashing of the potatoe will increase the time before impact.
-The next classmate(sorry i forgot his name) chose the water. But when an object hits water above 25mph, its like hitting brick wall. SO..... he didn't survive the fall. =[
-Eric chose the tree which can potentially save his life. Professor mason then told us a story about how a female flight attendant survived the fall from 30000+ft when she hits a tree and broke quite a few dozen bones but she survived.
-Chris was next and he Chose the snowy slope. Then professor mason told another story about how a British pilot during WWII survived a fall from 7000ft by aiming at a snowy hill. He only broke one bone but after he landed he was POW for 2 more years.
-Max was last and the only place left was the concrete road. Well at less its quick right?

Then professor Mason continue talking about momentum and the change in momentum. He introduce the change in momentum is Impulse.
F=ma
F=m(dv/dt)
Fdt=mdv

Then professor Mason showed how a satellite orbit goes around the moon and lands on earth, like Apollo 13 flight orbit. But the moon orbits around the Earth also, so we need to launch the rocket at a certain angle from the moon initial position and but the time the rocket reach the moon, it should the moons orbit should be in the rocket's path. Professor Mason also explain how the miscalculation of china shooting down its satellite increase the space junk. Poop is also a type of space junk. For our next project we need to design a flight plan to shoot down an orbiting satellite while avoiding all the space junk.We were assigned to our new group.

Then there was the long needed break. And the remaining group present their project while the rest of us worked on the Apollo vphython.