Q90 / 125 · BITSAT 2013 · Physics
The minimum velocity (in $\mathrm{ms}^{-1}$ ) with which a car driver must traverse a flat curve of radius $150 \mathrm{~m}$ and coefficient of friction 0.6 to avoid skidding is
- A60
- Correct answerB30
- C15
- D25
Solution
The condition to avoid skidding,
$$
\mathrm{v}=\sqrt{\mu \mathrm{rg}}=\sqrt{0.6 \times 150 \times 10}=30 \mathrm{~m} / \mathrm{s}
$$
Hence, the correct answer is option: 'B'.