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Question

If a cyclist moving with a speed of 4.9 m/s on leveled road can take a sharp circular turn of radius 4m, then the coefficient of friction between cycle tyre and road will be

A
0.81
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B
0.41
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C
0.71
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D
0.61
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Solution

The correct option is D 0.61

For movement on circular path,centripetal force = force of friction

mv2r=μmg

v2=μrgμ=v2rg=4.9×4.910×4=0.61


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