31. (a) What is the need for banking a
road? Determine the maximum
speed with which a vehicle can safely
negotiate a curved road banked at an
angle 'e'. (b) A bus moving with a
speed of 10 m/s negotiates a flat
circular road of radius 10 m. What
should be the coefficient of friction
so that the bus may not skid off the
road? (g = 9.8 m/s2)
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