Physics Two Dimensional Motion Question 314

Question: The maximum speed of a car on a road?turn of radius 30 m, if the coefficient of friction between the tyres and the road is 0.4, will be

[CBSE PMT 2000]

Options:

A) 10.84 m/sec B)9.84 m/sec C) 8.84 m/sec D)6.84 m/sec

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Answer:

Correct Answer: A

Solution:

$ v=\sqrt{\mu rg}=\sqrt{0.4\times 30\times 9.8}=10.84,m/s $