On The Measurement Of Speed
- From: The Ghost In The Machine <ewill3@xxxxxxxxxxxxx>
- Date: Sun, 28 May 2006 22:00:12 GMT
Herewith several problems for the assemblage -- you know who you are.
[1] I travel from Atlanta to Boston, then back to Atlanta. Assuming 2200
miles total [*] and 44 hours driving time (not counting stops for lunch
and sleeping), how do I calculate my average speed?
[2] A friend travels from Chicago to Detroit, meets a friend there, then
travels back. Assuming 280 miles and 5 hours, 36 minute driving time (not
counting stopping for lunch with said friend), how do I calculate his or
her average speed?
[3] A light beam travels along a straight path of length 1 km, reflecting
off a mirror at the far end, and triggering a sensor both when it leaves
the laser, and another sensor when it returns. If the sensors are
triggered 6.6712819 ns apart, how do I calculate the light's average speed?
[4] Indianapolis motor speedway is a 2.5 mile oval, and a race is run
for 200 laps of this oval. Assuming the leader of the race took 3 pit
stops of 20 seconds each and ran the entire race in a time of 2 hours, 31
minutes, what is the leader's average speed?
[5]-[8] What is the average velocity for each of [1]-[4]? (Answer: zero.)
[9]-[12] What is the relevance of average velocity for each of [1]-[4]?
(Answer: zero.)
[13] How much intelligence does it take to figure this out?
[*] as measured by surveyor, in case you're wondering. However, effects
at the contemplated speeds, except for [3], are on the order of 5 * 10^-14
anyway.
--
#191, ewill3@xxxxxxxxxxxxx
It's still legal to go .sigless.
.
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