Question

The speed of a train is faster than a car how will we prove it

Answer 1

Sadly, all of the answers below are wrong. One cannot prove that the speed of the train is faster, or slower, than that of a car until you specify the frame where the speed is computed. In the frame of the train, the car’s speed is always greater than or equal to the (zero) speed of the train. In the frame of the car, the train ditto. In the frame of the ground, either can be greater, and the question of “proof” is a matter of measurement and observation. One also has to address average versus instantaneous speed. There are many ways of performing the measurements and many ways of doing the computation, once you’ve specified the frame, but hey, in one frame of reference I’m traveling around a million miles a day (relative to the Sun) sitting in a chair, and certain times of day I’m adding 700 mph to that while trains on the other side of the Earth are taking 700 mph away from that, meaning that no matter how fast cars and trains are going relative to the ground where they are located, I’m going faster than they are!