A motor car has a width $1.1$ m between wheels. Its centre of gravity is $0.62$ m above the ground and the coefficient of friction between the wheels and the road is $0.8$. ...... $m/s$ is the maximum possible speed, if the centre of gravity inscribes a circle of radius $15$ m ? (Road surface is horizontal)
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(c) $v = \sqrt {\mu \;g\;r} = \sqrt {0.8 \times 9.8 \times 15} = 10.84\;m/s$
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