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2014-06-17T15:04:08-03:00
72km/h = 20m/s

Fcp = m*V²/R
Fcp = 800 * 20² / 200
Fcp = 4 * 400
Fcp = 1600N

P = FN
FN = m * g
FN = 800 * 10
FN = 8000N

Fcp = Fat
1600 = u*FN
1600 = u*8000
u = 1600/8000
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u = 0,2
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