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p = p₂
m*v = m₂*v₂
5,1 * v = 0,1 * 600
v = 11,8 m/s
S = a*t²/2
100 = a*400/2
200a = 100
a = 0,5 m/s²
siła tarcia:
Ft = ma = 5,1 * 0,5 = 2,55 N
współczynnik tarcia = siła tarcia/ciężar
Fc = mg = 5,1*10 = 51 N
f = Ft/Fc
f = 2,55/51 = 0,05