The maximum velocity (in $ms^{-1}$) with which a car driver must traverse a flat curve of radius $150 \,m$ and coefficient of friction $0.6$ to avoid skidding is
AIEEE 2002, Easy
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(b)$v = \sqrt {\mu rg} = \sqrt {0.6 \times 150 \times 10} = 30\,m/s$
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