Q.

A car moving at 18 kmph tries to round a corner in a circular arc of 8 m radius on flat roadway. How large must be the coefficient of friction  between wheels and roadway if the car is not to skid?

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a

0.22

b

0.52

c

0.12

d

0.32

answer is D.

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Detailed Solution

v=18×518=5 m/sμ=v2rg=258×9.8=0.32
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