Act 1

Speed Demons - Act 1 from Nathan Kraft on Vimeo.



Act 2
If you know the distance the car traveled and the time it took to move between the two points, you can find its velocity by dividing distance by time. You could use Google Earth to figure out the distance on the video. Type in the address: 1541 W Laurel Blvd, Pottsville, PA.
I would suggest you collect your data like this: First, play the video and pause it when a car is on the far left or far right of the screen. Record the start time. Bring up the line tool on Google Earth (set it to path) and click where you think the car is on the map. Obviously there will be some error in the measurement. Play the video and pause it when the car is on the opposite side of the screen. Record the end time and click the location on Google Maps. Record the distance (in feet). You could try to measure in miles, but you'll only get two decimal places which is not accurate enough for our calculations.
Then convert feet to miles by dividing by 5280. Convert seconds to hours by dividing by 3600. And make sure you have enough significant digits for each. The numbers can get very small (ie 0.033 for miles and 0.00092 for hours). Then divide miles by hours to get your speed.

Speed Demons - Act 2 from Nathan Kraft on Vimeo.


I suggest having students creating a table like the one below.
table.jpg

There might be some question as to what kind of fines these fine people should be getting for speeding. You can use this info which I found here:
  • ACTIVE SCHOOL ZONES — Special Penalties:
  • Active school zones always have speed limits of 15 m.p.h.
  • For going 16 to 25 m.p.h. (that is, 1 to 10 m.p.h. over) in an active school zone:
  • 3 points, AND
  • Fine & costs of about $119.50 plus $2 per each m.p.h. over 5 m.p.h. over the limit. In other words, the first 5 m.p.h. over the limit don’t carry any extra fine over the $119.50.
  • For going 26 m.p.h. (11 m.p.h. over) or faster in an active school zone:
  • 3 points, AND
  • Fine & costs of up to about $584.00. This number includes the “$2″ multiplier mentioned above.
  • If it’s at least your second time being convicted of speeding in a school zone (regardless of how much over 15 m.p.h. you were going):
  • The above-mentioned penalties,
  • PLUS a 60-day license suspension.

Act 3