State Bernoulli’s Principle. A man standing while on a railway platform, feels a push towards the train as train is passing the man with high speed. Explain the above event using Bernoulli’s Principle.

Explanation

It states that the sum of pressure energy, kinetic energy and potential energy per unit volume of an incompressible and non-viscous fluid is constant provided that fluid is ideal and flow is streamlined. Mathematically it, can be expressed as ` P+ (1)/(2) rho v ^ 2 + rho gh = ` constant.
As per Bernoulli’s principle pressure is lower in the region of faster velocity. Pressure between man and train will be lower due to faster velocity of train. On the other side higher pressure will push the man toward train.