I'm coming up with the wrong answer and I don't knwo why.
10.13 m/s= (3ft/1m)(1 mi/5280ft)(60s/1hr)
Meters, seconds, and feet cancel out leaving mph, but I'm getting something else.
2007-09-09 09:41:13 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Your calculation is flawed because you are assuming that 1 metre is 3 feet. 1 metre is 39.37 inches, while 3 feet are 36 inches. I make it 22.7 mph.
2007-09-09 09:55:55 · answer #1 · answered by Michael B 6 · 0⤊ 0⤋
Your assumption that 1 m = 3 ft was but a MINOR contributor to your result, which I note that you didn't give us. I think that your MAIN difficulty was that you used the conversion 60 s = 1 hour, forgetting that "minutes" intervene between the hour and the seconds here:
1 hour = 60 mins = 60 x 60 s = 3600 s.
So 10.13 m/s = 3600 x 10.13 m/hr.
Now 1 m = 100cm = 100 /2.54 ins = 39.37 ins = 39.37/ 12 ft = 39.37/(12x5280) miles = 0.00062137... miles
So 10.13 m/s = 3600 x 10.13 m/hr =
3600 x 10.13 x 0.00062137 mph = 22.66... mph.
Live long and prosper.
2007-09-09 17:01:52 · answer #2 · answered by Dr Spock 6 · 2⤊ 0⤋
10.13m/s x 3,600s/hr = 36,468m/hr (s cancels)
36,468m/hr ÷ 1,000m/km = 36.47km/h (m cancels)
36.47km/h ÷ 1.6km/mile = 22.8mph (km cancels)
2007-09-09 22:49:19 · answer #3 · answered by Norrie 7 · 0⤊ 0⤋