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Know about relativity

Firing gun scene-1

What would happen if you fire a gun on a train moving as fast as a bullet? 

now try to answer this question---- you will be surprised to know that the answer is completely in the reverse sense of your thought.

From the newtons 1st law we can understand that- a body in motion stay in motion and a body in rest stays in rest unless acted upon by an external force.

Imagine you are on a perfectly smooth speeding train, moving at a uniform speed , in a car/coach with no windows. You would have no way of knowing how fast you are going (or if you were moving at all). If you throw a ball straight up in the air, it will come straight back down whether the train is sitting still or going 1,000 mph. Since you and the ball are already moving at the same speed as the train, the only forces acting on the ball are your hand and gravity. So the ball behaves exactly as it would if you were standing on the ground and not moving.
So what does this mean for our gun? If the gun shoots bullets at 1,000 mph, then the bullet will always move away from the gun at 1,000 mph. If you go to the front of a train that is moving at 1,000 mph and shoot the gun forward, the bullet will move away from you and the train at 1,000 mph, just as it would if the train were stopped. But, relative to the ground, the bullet will travel at 2,000 mph, the speed of the bullet plus the speed of the train. So if the bullet hits something on the ground, it will hit it going 2,000 mph.
If you shoot the bullet off the back of the train, the bullet will still be moving away from you and the gun at 1,000 mph, but now the speed of the train will subtract from the speed of the bullet. Relative to the ground, the bullet will not be moving at all, and it will drop straight to the ground.

Isn't this pretty interesting to judge the movement of the bullet according to the reference frame?
If you have any exciting examples or describing the motion of the bullet with any reference frames, you are free to comment and if you want to show them to every one ... just mail to : polkampallyarun@gmail.com

 

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