A car moving at 41 km/h negotiates a 140 m-radius banked turn designed for 60 km/h. What coefficient of friction is needed to keep the car on the road?(adsbygoogle = window.adsbygoogle || []).push({});

Ok can some one tell me what i did wrong?

F_{c}= (m*V^{2})/r = m µ g

Vmax= square root of ((µ) g r)

60 = square root (µ*9.8*140)

for mu i got 2.62391

i used the 60 km/h because that was the maximum velocity of the curve

how ever when i checked it its wrong ... my book does not say anything about the friction involved with a banked curve. help

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# Homework Help: Friction in a banked turn

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