Collisions

Collisions by Aidan Jamison-Frank

Hey you, you see this above? This is what will never happen to a Physics student. This is because any physics student can calculate when any two cars are going to crash. As more and more people learn physic in school, the amount of crashes have gone down. See the graph below.

The speed limit in the city is 11m/s (25 mph)

Bob is riding down the road, and a few different things can happen >>>
 * 1) Reckless speeding
 * 2) How long will it take a car which is speeding to hit someone who is traveling the speed limit if they are not paying attention?
 * 3) Lets Assume that Car A is speeding and Car B is going the speed limit.
 * 4) Calculate for different distances between the cars (at least three).
 * 5) If Car A was traveling 11m/s faster than Car B (and the city speed limit). In other words, Car A is traveling 22m/s towards Bob.
 * 6) 106m (1 city block) would take 9.6 sec
 * 7) 53m (half block) would take 4.8 sec
 * 8) 27m (.25 block) would take 2.4 sec
 * 9) If Car A was traveling 15 m/s faster than Car B (26m/s)
 * 10) 106m (1 city block) would take 7 sec
 * 11) 53m (half block) would take 3.5 sec
 * 12) 27m (.25 blocks) would take 1.75 sec
 * 13) If Car A was traveling 20 m/s faster than Car B (31 m/s)
 * 14) 106m (1 city block) would take 5.3 sec
 * 15) 53m (half block) would take 2.6 sec
 * 16) 27m (.25 blocks) would take 1.3 sec
 * 17) Trains and cars collide often because of drivers not paying attention due to their cell phones or radios. Given different distances (at least three), calculate how long it takes for cars to collide head on and at what positions they will collide.
 * 18) If you assume that vehicles have a given stopping time (acceleration which car can stop – research online), would the collision be preventable for your three different distances if the drivers reacted a certain amount of time beforehand? What would that time have to be?
 * 19) Going the speed limit (11m/s) Dry conditions
 * 20) All 3 scenarios, you'd have enough time to stop
 * 21) Going 15 m/s
 * 22) There would be a good chance that you'd rear end someone with only a quarter of a block's reaction time.
 * 23) Going 20 m/s
 * 24) You'd hit someone with only a half block or less for reaction time

Sources: http://www.studyzone.org/testprep/ela4/i/speedlimit25.jpg [] http://pictures.directnews.co.uk/liveimages/car+crash_1058_18462860_0_0_7008396_300.jpg http://www.tw.gov.nl.ca/CollisionStats/pamphlet.stm CLICK HERE RETURN TO HOME PAGE!