:banghead) :banghead) :banghead) :banghead) :banghead) :banghead) :banghead) :banghead) :banghead) :banghead) this is what i feel like doing right now. i just struggled through the webassign and everything is so tough. I looked through my notes, which to me look like a foreign language, and i tried looking through the book to help me out, but even that offered little comfort to me. I know yelling at the computer screen wont help me any more on this webassign, but i do enjoy it
Everyone has seen a figure skater spin, where the skater draws her arms and a leg in and speeds up tremendously. This is the result of conservation of angular momentum. As the skater reduces her rotational inertia by pulling her arms and leg in, her rotation speed must increase to maintain constant angular momentum. Angular momentum conservation plays a VERY important role in all figure skating routines. See for yourself:
Angular momentum applies to a body rotating around a fixed object. Th
Thank you tim! Today i learned how to derive a polynomial in physics class. Since my precalc class never covered derivatives last year, i was completely lost for a few minutes today in class. Once my table partner was made aware of this fact, he taught me what to do, and now i am smarter going out of the class than i was coming in. Who knew?
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<< I can do that...
Break dancing is an art form that requires immense skill and strength. A strong core is necessary for executing the intense and seemingly impossible moves. There are many different moves in the break-dancer’s repertoire, but one of the hardest is the windmill.
In the windmill, the breaker rotates from his back onto his front and onto his back again while keeping his legs locked on the V-position and rotating about his center of mass. It i
Its without a doubt that physics is at work in virtually every aspect of the game of football, but it is shocking to see just how intense the physics truly is on the human body. The average tackle creates anywhere from 30-60 G's of force. That's an acceleration of anywhere from nearly 300 m/s^2 to 600m/s^2. Luckily, however, that force is experienced for only an instant, and usually leave the player a little sore but relatively unharmed. If this type of force was experienced for any longer, it c
Since i missed last weeks blog, i thought i'd entertain the masses by posting a few very interesting physics facts!
If the Sun were made of bananas, it would be just as hot. If, instead of hydrogen, you got a billion billion billion tons of bananas and hung it in space, it would create just as much pressure, and therefore just as high a temperature. So it would make very little difference to the heat whether you made the Sun out of hydrogen, or bananas, or patio furniture.
All the matter t
My blogs have been rather long recently, so I'm thinking I should just keep this one brief. I think I'll talk about my future AP prep plans. First off I have recruited Tim to be a part of my 1 man study group (for those of you keeping track at home that means that now there are 2 people in it). Anyways so yeah, we've made a verbal pact that we will work extra hard to get some college cred (and street cred, maybe) from the physics AP. Can't wait to buckle down and get some work done. Looking forw
Hello, i am an Ap-C physics student, and many are asking why. So am i. However i love a challenge and math/physics are my two favorite classes. I plan to take the skills im learning now with me into the future and use them in college, where i plan to major in mechanical engineering. i know that if i have success in this class, i can have success anywhere, and therefore i am looking forward to working hard in this class and bettering my knowledge of physics. Im excited about learning all the new
So as part of our assignment i was told to blog, so hear it goes. And while im sitting here watching Spongebob i might as well do something productive.
In response to momentum and impulse, i embedded a video of something pretty cool. So say two cars, each of approx. 1100kg, each going 30 m/s collide head on. One a 2009 Chevy and the other a 1959 Chevy. First of all, if this collision is totally inelastic, and we can assume that Ptotal=(M1 + M2)V, and therefore (2200kg)(30m/s)=66000kg*m/
After only fully completing 14 out of 24 question on the webassign (58.3%) and recieving partial credit where i can, boosting my grade to an 81.5% (thank god for the curve), i realized that the problems i knew the best were all stuff from last part of W & E, and i found it very easy to do. two weeks ago i would have been banging my head on the wall attempting them. i dont know why, but even last year i had this problem where during the unit i was stumped, but immediately after it was over i
So im trying to do the lab write up thing that's due tomorrow but I cant open up the website thing when i click run now. So seems like i'll have to wait til tomorrow to do it. Hopefully i can get it all done in time. Looks like I'm doing webassign instead.
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In loving memory of THE WIDOW MAKER, I thought I would bring back some old-school physics.
Well, our catapult launches the ball at a certain velocity (v), directed at, let's say, 45 degrees upward. For projectiles, you have to break the velocity into an upward and a horizontal velocity. The upward velocity is v sin(45) and the horizontal velocity is v cos(45), so they are both .707v. The reason you do this is because the projectile travels to its highest point with its upward velocity in the sa
Calm down Souf its not what you think...
I did that conservation of momentum/energy experiment at my household with a golf ball and a pretty lumpy basketball. (Of course upon examining the golf ball it also appeared to be in pretty rough shape.) Holding the golf ball from a height of 5 feet, i saw that it bounced up to a height of nearly 3 feet, and dropping the basketball from that same height it rebounded 1 foot. After dropping them together from 5 feet repeatedly my data is as shown.
I've heard around the water cooler that, due to a bee's mass, its tiny wings shouldn't physically be able to make it fly. However, I have recently learned something new about it. V irtually all insects flap their wings through a wide arc, about 165 degrees. Frequency generally varies with size: The larger the insect, the slower the wing beat. Mosquitoes, for example, beat their wings about 400 times per second, while fruit flies beat there wings about 200 times per second. Birds beat their wing
Hello children, if some of you are not planning on buying the physics review book, then there are ample resources on the internet (obviously). The best place i've stumbled upon is simply called http://www.learnapphysics.com/apphysicsc/index.html and it goes in order from unit to unit, not adding or subtracting anything and covering the basics as well as explaining the answers to the questions fully and in detail. I've already been using this resource and i feel that it is helping me a lot and i
Nobody in my group has even attempted to start our catapult (thatguy and daboss), so looks like im going to have to do it all AS USUAL. However i've heard many opinions saying that building a trebuchet will be more efficient and overall better than a catapult. well i'm here to say i have no sort of time to do that kind of construction. My catapult wont even be a real catapult. Im going to have to rely on a big spring to do the work of shooting the arm around to throw the ball. Basically you're g
I found this article online and thought it was pretty interesting...
When you hear the phrase "alternative energy," chances are your mind goes to windmills and solar panels, or perhaps fields of corn. Few people think of human beings as a renewable energy source. But a new lamp design taps into just that idea.
It's not a new concept: Wind-up watches and clocks, and even hourglass-style timekeepers, have relied on humans as energy sources for many centuries. A person winds it up or flips it o
So i received my 4th quarter grade report today and was shocked to find my grades very low. Now normally i wouldnt be too astounded but when my grade is in the 70's when we've done little more than prepare for the ap's, it's a little unnerving. Maybe i havent been blogging enough or something, even though i assumed i was exempt from it now that ap's are over. but thats neither here nor there. And its not just in physics. Every ap class has given me a much lower grade than i deserve, which is wei
I came across this cool book and I thought the stuff in here was very interesting. Apparently this will happen all by the year 2100, and the results will be just as amazing as the technology.1. The Internet will be in your contact lens. It will recog nize people’s faces, display their biographies, and even translate their words into subtitles.
2. You will control computers and appliances via tiny sen sors that pick up your brain scans. You will be able to rearrange the shape of objects.
A number of weeks ago i was driving through the snow(yes I am very far behind on my blogs, I know), when i was coming to a turn. Not only was this turn covered and i nice fresh blanket of snow, but i was also going down an incline. However, as i was nearing the turn, i ever so lightly tapped the brakes, sending me on a tangent straight for an unsuspecting mailbox. White-knuckling the steering wheel and exclaiming a number of shocked obscenities, I was able to escape certain death by mere inches.
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