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Questions  

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?

a
0.22
b
0.52
c
0.12
d
0.32

detailed solution

Correct option is D

v=18×518=5 m/sμ=v2rg=258×9.8=0.32

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