Assignemnt+1

** The Good, The Bad, and The Ugly **
For this part of the assignment you will need to find video clips of movies that demonstrate good, bad, and ugly physics. For example, I showed a video clip in class from the movie “Eraser.” This filmed demonstrated ugly Conservation of Momentum. I then spent time in class showing why this was ugly physics. You will need to do the same thing for your project. Create a page titled “Good, Bad, and Ugly Physics”. Find videos that demonstrate this type of physics, and upload it to your wiki page. Under each video give an explanation of why it is Good, Bad or Ugly. This explanation will probably have to include calculations too. Once you have your page done include one of your clips with explanation below so that we can create a class resource as well. Be sure to email me that you have complete this assignment so I know that you are done.

**__The Bad__** - Kate Dray

As we all know, the show SpongeBob SquarePants is not known for being too scientifically accurate. The characters use electronics underwater, Squidward plays a clarinet underwater, and the characters drive boatmobiles (or, in Spongebob’s case, attempt to drive boatmobiles) underwater.

In one episode, Spongebob jumps out of a building and ends up falling for about 2 seconds before he returns to where he started. I am going to prove this to be extremely scientifically inaccurate.

For the sake of the argument, we are going to assume Spongebob is falling through air. Although he is supposed to live underwater, everything else in the show is done assuming that lives in air.

Let’s say that the distance between the floor that SpongeBob is on and the top floor is about 20 stories, so about 90 meters, since when we see Spongebob through the window, he is extremely small. Let’s also assume that he jumped off the building with a starting velocity of about 2 m/s. We can then find the time it takes him to fall based the rearranging of the equation:

d=vit+1/2at^2 0= vit+1/2at^2-d 0=2t+1/2(-9.81)t^2-(-90) 0=-4.9t^2+2t+90

Using the quadratic formula, we can now solve for t. We get 2 solutions, but as one is negative, it is obviously not the answer. Spongebob should hit the ground in about 4.49 seconds.

In the video, it takes Spongebob only 3 seconds to climb up to the top of the building, fall off, and get all the way back to the sea cucumber.

[]

**Gone in 60 Seconds bad physics - Austin McElderry**
There is no way that Mustang could make that jump. The Mustang was traveling at a speed of 120 mph or 54 m/s and he went up a ramp at 45 degrees. It took him about 5 seconds for him to come down. Just using the x factors he could not have made it. He would have only gone 191 meters. In the video it shows the car jumping about half the bridge. The bridge the director used was the Vincent Thomas bridge which spans 460 meters. Divide that in half and the car had to make it over 230 meters and it clearly didn't. The car doesn't follow a parabolic path. The car stays at the same height and then suddenly falls. Even if he could land the jump, his car would probably not be able to drive away perfectly. This was done by CGI. []

** Bad ** Malory Groen In the movie //Taxi //, Queen Latifa tricks Gisele into jumping her car over a huge gap and trapping her on a small stretch of a bridge. I will assume that Gisele was traveling at about 90 mph because this is a pretty intense scene. 90 mph converts to 40.23 m/s. The distance that the car jumped was 11.2 times the car length. The average length of a four-door compact car is 4.12 m. This would mean that the jump was approximately 46.12 m. This jump also had virtually no incline, but I decided to give them a 5° incline for the benefit of the doubt.  V ix =V i cos ө40.23cos5 40.08 m/s  V iy =Visin ө 40.23sin5 3.51 m/s  D x = (V i + V f ) t 2  2 Dx = (V i + V f ) t 2 D x  = t  (V i + V f ) t = 2 (46.12). = 1.15 (40.18+40.08)  d = Vi t + ½at 2  d = 0 + ½(-9.8)(1.15) 2 = -2.44 This means that by the time the car should be reaching the other side of the jump, it will have already dropped 2.44 m below the landing. <span style="background-color: transparent; color: #0000ff; font-family: Times New Roman; font-size: 12px; text-align: left; vertical-align: auto;">__[|Video Clip]__ (2:03-2:10) <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 16px; text-align: left; text-decoration: none;">**<span style="background-color: transparent; color: #000000; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">Good physics ** 2001: A Space Odyssey-Alec
 * < <span style="background-color: transparent; color: #ffffff; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;">. ||< <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;">x ||< <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;">y ||
 * < <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;">V i ||< <span style="background-color: transparent; color: red; display: block; font-family: 'Times New Roman'; font-size: 12pt; text-align: left; text-decoration: none;">40.08 m/s ||< <span style="background-color: transparent; color: red; display: block; font-family: 'Times New Roman'; font-size: 12pt; text-align: left; text-decoration: none;">3.51 m/s ||
 * < <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;">V f ||< <span style="background-color: transparent; color: red; display: block; font-family: 'Times New Roman'; font-size: 12pt; text-align: left; text-decoration: none;">40.08 m/s ||< <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12pt; text-align: left; text-decoration: none;">-- ||
 * < <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;">a ||< <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;"> 0 m/s 2 ||< <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;"> -9.8 m/s 2  ||
 * < <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;">d ||< <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12pt; text-align: left; text-decoration: none;">46.12 m ||< <span style="background-color: transparent; color: blue; display: block; font-family: 'Times New Roman'; font-size: 12pt; text-align: left; text-decoration: none;">-2.44 m ||
 * < <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 12px; text-align: left; text-decoration: none;">t ||< <span style="background-color: transparent; color: #ff6600; display: block; font-family: 'Times New Roman'; font-size: 12pt; text-align: left; text-decoration: none;">1.15 s ||< <span style="background-color: transparent; color: #ff6600; display: block; font-family: 'Times New Roman'; font-size: 12pt; text-align: left; text-decoration: none;">1.15 s ||

<span style="background-color: transparent; color: #000000; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">This movie demonstrates Newton’s first law, <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 16px; text-align: left; text-decoration: none;">every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it, <span style="background-color: transparent; color: #000000; display: block; font-family: 'Times New Roman'; font-size: 16px; text-align: left; text-decoration: none;">perfectly. After Frank Poole (the astronaut in the space suit) is detached from his safety wire by HAL 9000, he goes flying off into space because he was going at a certain speed. Before the wire was keeping him attached to the ship, but now that he isn’t attached to the ship anymore he just keeps on going because there is no external force to slow him down/stop him. <span style="background-color: transparent; color: #810081; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;"> __[]__

=<span style="background-color: transparent; color: #000000; font-family: Times New Roman; font-size: 32px; text-align: left; text-decoration: none; vertical-align: auto;">Good Physics- Billy Osborne = <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;"><span style="background-color: transparent; color: #810081; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; vertical-align: auto;">__[]__ **In the movie "When in Rome" there are coins tossed into a fountain found in Rome. All the coins that are thrown into the fountain sink. They sink because their densities are larger than the density of water. Copper which is the main component of a penny has a density** = ** 7.81 X 10³ kg/m ³ compared to water that has a density of 1.00 X 10 ³ kg/m³. Knowing these densities that explains why a penny will sink in water. ** =

__UGLY PHYSICS- Joseph Kenkel: GOOD BURGER__
<span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">[] watch 2:20-2:53 <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">I thought it was quite unrealistic that a spatula, probably stainless steel, would bend that much from the weight of a hamburger (even if it is a huge burger) <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;"><span style="background-color: transparent; color: #0066cc; font-family: 'Times New Roman'; font-size: 18px; text-align: left;">__[|http://www.matweb.com]__ states that stainless steel has a compressive yield strength of 262 Mega pascals (meaning it can take 262Mpa until it bends). Converting this into pascals, we multiply 262 x 10^6 (to bring Mega to Deka). We get 262,000,000 pa. We are going to use this number as "P" in our pressure equation, P=F/A. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">I measured a standard restaurant-style spatula to have a 2mmX10mm cross section on its handle. The handle is rectangular, so by multiplying the dimensions we find a cross-sectional area of 20mm squared. Dividing by 1000 twice, we find that the area of is: .00002 m squared. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">Well we have Pressure (262000000pa) and Area (.00002m squared). So now, we solve for Force. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">F=PA, so we multiply 262000000 x .00002 = 5240 N. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">To convert to pounds we use the conversion factor of 1pound=.224808943 newtons <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">5240 x .224808943 = 1177.99 Lb <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">Wow. In order to get the spatula to bend like that, the burger would have to weigh AT LEAST 1178 pounds. That's a huge burger. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">This is UGLY PHYSICS. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">The end.

<span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;"> __Ugly: Physics - Nicole Hanlon__ <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;"> Speed with Keanu Reeves. A bus jumps a 50ft gap in the road. Projectile Motion <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;"> In the movie Speed a bus going 70mph (or 31.29 m/s) jumps a 50 ft (or 15.24 meter) gap. We will assume that there is no angle in the ramp and that the ramps are even in height with each other. If you try to find the time by assuming that the bus does jump the 50 ft you can find the time it would take for it to do so using the equation d = v/t. Rearrange for t and get t = v/d = 31.29 / 15.24 = 0.487 s. Because time is equal in both the x and y directions we can then use the time we found that it would take to jump the 50ft gap and use it to see if the bus would fall any distance. We can use the equation d = vit + 1/2 a t squared. The a of course being acceleration due to gravity. Because vi is 0 the equation becomes d = 1/2 a t squared. = 1/2 (9.8) (.487)squared = 1.16 meters. The bus would not have made the jump because it would have fallen 1.16 meters and ran into the ramp instead of landing on it. [|bus jump clip]

<span style="background-color: transparent; color: #000000; font-family: serif; font-size: 22.4px; text-align: start; text-decoration: none; vertical-align: baseline;">Good Physics- John Kintz =<span style="background-color: transparent; color: #000000; font-family: serif; font-size: 32px; text-align: start; text-decoration: none; vertical-align: baseline;">__<span style="background-color: transparent; color: #0000ee; font-family: serif; font-size: 32px; text-align: start; vertical-align: baseline;">[|Joker Falling] __ =

In The Dark Knight, Batman throws the Joker off the top of a skyscraper, then catches him with his Grappling Gun. Disregarding his ability to aim, assuming that the Joker's initial velocity was 0 m/s, using the acceleration of gravity(9.8 m/s^2) and getting a time of 4.19 s in freefall, we can use the equation d=vit+1/2at^2 to find the distance that the Joker travels. Doing this, I found that he fell approximately 86 m, or 282 ft before Batman was able to catch him. Since the average height of a skyscraper is anywhere between 500 and 750 m tall, and the Joker seems to have fallen about halfway before being caught, the physics in this movie appear to be accurate.