Braking Distance (How To Calculate Braking Distance)

Braking Distance

It is the distance traversed by a vehicle between the points, at which brakes are applied and the point at which the vehicle comes to stop.

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How To Calculate Braking Distance

Braking distance may be obtained by equating the work done in stopping the vehicle and the kinetic energy. If v is the design speed of the vehicle in m/sec, f is the coefficient of friction, W is the total weight of the vehicle and g is the acceleration due to gravity = 9.81 meter per second square, I is the braking distance then:

kinetic energy at design speed =   \frac{mv^{2}}{2} = \frac{Wv^{2}}{2g}

Work done against friction force in stopping the vehicle = f.W. I

Hence, f.W.I =    \frac{Wv^{2}}{2g}

or, I =   \frac{v^{2}}{2gf}

If  V is the speed of the vehicle in kilometer per hour(Kmph), then

When (V) speed in Kmph then, v =0.278V