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Laws Of Motion

Question
CBSEENPH11017021

At what angle the circular railway track of radius 200 m must be banked for speed 72 km/hr?

Solution

Given,
Radius of the circular railway track, r = 200m
Speed of the train, v equals 72 space k m divided by h r space equals space 20 space m divided by s
We know, the angle of banking is,
               straight theta equals tan to the power of negative 1 end exponent open parentheses fraction numerator v squared over denominator r g end fraction close parentheses
rightwards double arrow    space space straight theta equals tan to the power of negative 1 end exponent open parentheses fraction numerator left parenthesis 20 right parenthesis squared over denominator 200 cross times 9.8 end fraction close parentheses equals 11 degree 32 apostrophe, is the angle of banking.