Question
Sat July 07, 2012 By:
 

a van is moving with the speed of 72 km/h on a level road, where the coefficient of friction between its tyres and road is o.5.The minimum radius of curvature, the road must have, for save driving f van is?(g = 10 m s-2) a) 80m b) 40m c) 20m d) 4m

Expert Reply
Sat July 07, 2012
Velocity of van, v = 72 km/h = 20 m/s
acceleration due to gravity, g = 10 m/s2
?????coefficient of friction, ? = 0.5
While cornering,
Frictionnal force on vehicle, F = mg?
let radius of curvature be r
centripetal force on van should be equal to frictional force, i.e.
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