A Stationary railway platform on earth is .

An observer is standing on a railway platform. He hears the whistle of railway engine moving towards him and then passing. He fells that

You are waiting for a train on a railway platform. Your three year old niece is standin on your iron trunk containing the luggage. Why does the trunk not recoil as she jumps off on the platform?

You are waiting for a train on a railway platform. Your three year old niece is standin on your iron trunk containing the luggage. Why does the trunk not recoil as she jumps off on the platform?

You are waiting for a train on a railway platform. Your three year old niece is standin on your iron trunk containing the luggage. Why does the trunk not recoil as she jumps off on the platform?

A person standing on a railway platform noticed that a train took 21 seconds to completely pass through the platform which was 84m long and it took 9 seconds in passing him.Find the speed of the train in km/hr.

In a stationary railway compartment, there are several passengers. If they start moving in the compartment, will CM of the compartment change ? Will the CM of the system of compartment and passengers change ?

A coolie is walking on a railway platform with a load of 30 kg on his head. How much work is done by coolie?