Body & Soul3 mins ago
how do i calculate speed in MPH ...???
10 Answers
Good morning AB'ers and a very happy bank holiday to you all.
My question for you brainboxes is this:
If my 1:10th scale model Radio controlled car covers 8.8 metres in 0.58 of a second, can anyone tell me how fast it's travelling in MPH....??
And if possible, how do i calculate this for future 'speed trials' ?
Many thanks all.
Eddie
My question for you brainboxes is this:
If my 1:10th scale model Radio controlled car covers 8.8 metres in 0.58 of a second, can anyone tell me how fast it's travelling in MPH....??
And if possible, how do i calculate this for future 'speed trials' ?
Many thanks all.
Eddie
Answers
Best Answer
No best answer has yet been selected by harley_Husky. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.Speed is proportional to distance divided by time d/t
88cm/s = 19.685mph
Using 88cm for the reference distance and 19.685 as the corollary conversion factor . . .
19.685 / 1 sec. = 19.685 mph
19.685 / 0.5s = 39.37 mph
19.685 / 1.5s = 13.12 mph
19.685 / 0.58s = 33.94 mph
If it is convenient to slightly increase the reference distance from 8.8 to 8.94 metres the conversion factor for this distance rounds out to a nice even 20.0 . . .
20 / seconds = mph!
Even using this simplified formula without modifying the reference distance of 8.8 metres introduces an error of less than 2%.
Incidentally (as I�m sure your aware) at 1/10 scale 8.8 metres in 0.58 seconds corresponds to 339.4 mph!
1 metre / second = ~ 2.237 mph
88cm/s = 19.685mph
Using 88cm for the reference distance and 19.685 as the corollary conversion factor . . .
19.685 / 1 sec. = 19.685 mph
19.685 / 0.5s = 39.37 mph
19.685 / 1.5s = 13.12 mph
19.685 / 0.58s = 33.94 mph
If it is convenient to slightly increase the reference distance from 8.8 to 8.94 metres the conversion factor for this distance rounds out to a nice even 20.0 . . .
20 / seconds = mph!
Even using this simplified formula without modifying the reference distance of 8.8 metres introduces an error of less than 2%.
Incidentally (as I�m sure your aware) at 1/10 scale 8.8 metres in 0.58 seconds corresponds to 339.4 mph!
1 metre / second = ~ 2.237 mph
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