Talk:Transportation/Archive 1

I think your calculation is wrong for the time a boat takes to hit full speed. Check it out:

Consider the boat with no running start. t = the time spent accelerating to top speed, s = top speed

For the first t seconds, the boat travels at an average speed of s/2 (starts at 0, ends at s, linear acceleration). For the rest of the trip (20.93 - t seconds) it travels at speed s. So with your numbers,

(s*t)/2 + (20.93 - t)s = 100

Multiply both sides by -(2/s) then add 41.86 to get

t = 41.86 - (200/s)

Which with your figure of 6.16 m/s for top speed gives t = 9.39 seconds. If your data is correct this should be the time it takes to hit top speed in a boat, not 4.7 seconds. -74.131.49.101 20:17, 22 July 2010 (UTC)