CONTENT NOT ON NOTES PAGE
ACTIVITY (first): how much time will it take your toy motorized car to travel 10.0m? You're not allowed to actually measure the time to travel that distance. What do you do? Go.
Always need some predefined coordinate system a.k.a. reference frame.
QUESTION: Guess, how many times faster are you going when you run, compared to when you walk? Now, do the experiments to determine what the ratio really is.
ACTIVITY: Motorized cars, one faster than the other. Have class measure time to cross 1m, 2m, 3m, etc. Graph x(t) in Excel. Relate velocity to slope of x(t).
ETYMOLOGY: the word speed comes from Germanic spowan, 'to prosper' or 'to succeed'. ETYMOLOGY: the word velocity comes from Latin velocitas, 'swift, rapid'. ETYMOLOGY: the word time comes from Old English tima, time (originally, a good or prosperous time.
EXAMPLE: Convert speed of 60 miles/hr into furlongs/fortnight.
EXAMPLE: During the week of the Blizzard of 1996, an icicle hanging from the eaves of my house grew to 14 feet long in 5 days. How fast did the icicle grow, in m/sec, mi/hr, and cm/day?