Question
Why are roads banked on curves?
Solution
To make a body move along a curved path, centripetal force is always required and this force is provided by friction on the flat road. But friction cannot exceed from its limiting value.
Therefore, when speed of a body becomes greater than a particular value Thus, centripetal force required will be greater than maximum value of friction and hence skidding takes place. To avoid this, tracks are banked. the outer edge of the curved road is raised above the inner edge. A component of normal reaction Rsinθ provides the necessary centripetal force.
Therefore, when speed of a body becomes greater than a particular value Thus, centripetal force required will be greater than maximum value of friction and hence skidding takes place. To avoid this, tracks are banked. the outer edge of the curved road is raised above the inner edge. A component of normal reaction Rsinθ provides the necessary centripetal force.
