the fixed point is a man observing outside the train as it pass by with some sort of instrument that can measure the speed of the man running inside the train .
2006-08-01 15:51:47 · 5 answers · asked by kingfph 1 in Science & Mathematics ➔ Physics
Is he running toward the front of the train or the back? The answer is either 80kph or 0kph.
BTW you left the word 'train' out of the original question.
2006-08-01 15:56:29 · answer #1 · answered by STEVEN F 7 · 0⤊ 0⤋
He is going approximately 80 kph.
He and the train are slow enough so that
relativistic effects are negligible. Technically
he is going a little slower than that. You can
calculate it with relativity.
2006-08-02 02:33:07 · answer #2 · answered by PoohP 4 · 0⤊ 0⤋
Which way is the man running? "With" the train or "against" it? Just want to be sure whay you're looking for.
2006-08-01 22:56:59 · answer #3 · answered by Intelligent and curious 3 · 0⤊ 0⤋
According to your question, he is still only going 40 kph
2006-08-01 22:59:42 · answer #4 · answered by Sparkybear 2 · 0⤊ 0⤋
Where did you find this guy? Can I get him on my team?
2006-08-01 23:23:50 · answer #5 · answered by Kuji 7 · 0⤊ 0⤋