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if you where going on a train doing the speed of light and you ran to the front of th train, would you be going faster than the speed of light

2006-09-08 05:10:43 · 12 answers · asked by Anonymous in Science & Mathematics Mathematics

12 answers

The train can't go the speed of light. The best it could do would be to approach the speed of light. If you ran on it fast enough to go over the speed of light, you might feel like you were going fast enough to take you over, but actually you'd be going only slightly faster than the train and the factor of difference would be due to time dilation (your frame of reference would be experiencing less time than the train, which would be experiencing less time than the outside universe). In fact, even if your train, going at almost the speed of light, crashed into another train going the same speed in the opposite direction, the collision would not happen at almost twice the speed of light but again just slightly faster than the speed of either train, and not quite at the speed of light. It is impossible for any frame of reference to observe anything going faster than light, or anything besides electromagnetic radiation and gravity going even at the speed of light.

2006-09-08 05:15:19 · answer #1 · answered by Anonymous · 2 1

So you know by now that the train can not go the speed of light. But lets suppose that the train is going 3/4 the speed of light and you were (some how) running 3/4 the speed of light yourself. Naturally it seems intuitive that you would simply add both the 3/4's to get 1.5 the speed of light--but this has to be wrong since nothing can exceed light speed. Here is how Einstein solved this: [Speed1 +Speed2]/[1+Speed1*Speed2/c^2]. For example, in this case the calculation would yield 1.5c/[1+9/16]=.96c.

2006-09-08 14:50:56 · answer #2 · answered by bruinfan 7 · 0 0

So why be on a train? If you are travelling 60mph in your car and turn on the headlights, is the light from your car travelling at C+60? Similar question. Same answer. You should be able to figure it out. (hint: if you're backing up do you slow down the speed of light)

2006-09-08 15:02:13 · answer #3 · answered by davidosterberg1 6 · 0 0

relative to the world outside the train yes. however everything inside the train would be traveling at the same rate and since all speed is relative to something else near by your relative speed would be the same as if you where running on the nonmoving ground.

ex: stars on one side of the galaxy are moving away from us at near light speeds. stars on the other side of the galaxy are also moving away at near light speeds. so relative to each other they appear to be moving at almost twice the speed of light. ponder that.

2006-09-08 12:19:23 · answer #4 · answered by bretttwarwick 3 · 0 0

Tough one. Your body would be travelling at a faster speed than light (I think) but you wouldn't be physically running fater than light. I think that the train and your body have to be looked at as separate objects. But I'm not 100% sure.

2006-09-08 12:18:01 · answer #5 · answered by Bob 1 · 1 1

Practically not possible
Mathematically if you in favor of the direction of light then your speed will be more or when you are against the speed of light then your speed will be less.

2006-09-08 12:27:08 · answer #6 · answered by Amar Soni 7 · 0 1

EINSTEIN'S THEORY OF RELATIVITY SAYS THAT ANYTHING TRAVELLING AT THE SPEED OF LIGHT WOULD BE CONVERTED TO PURE ENERGY. THUS BOTH YOU AND THE TRAIN WOULD NOT EXIST IN SOLID FORM, SO YOU COULD NOT RUN ON TRAIN.

2006-09-08 12:23:38 · answer #7 · answered by WOLFGANG 2 · 0 1

Acording to special relativity, time would be adjusted so that you are going the speed of light. As you approach the speed of light, your perception of time decreases, making it appear that you are not going as fast.

2006-09-08 12:17:08 · answer #8 · answered by MadScientist 4 · 1 2

I believe you would not be able to run on a train going any where near that fast. As soon as you tried to stand up you would most likely be thrown to the back of the train or train compartment.

2006-09-08 12:16:56 · answer #9 · answered by baldninja2004 2 · 0 3

train reach this speed concerning the earth. you won't reach this speed concerning the train. and the earth...hm..let's think more

2006-09-08 12:16:44 · answer #10 · answered by Austeja 2 · 1 2

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