A car turns a corner on a slippery road at a constant speed of 12m/s. If the coefficient of friction is 0.4, the minimum radius of the arc in metre in which the car turns is (in m)
A
36
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B
72
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C
18
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D
9
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Solution
The correct option is A36 Given: v=12m/s,μ=0.4v=√μrgr=v2μg=1444=36m