Question

A 1-kilometer long train is travelling at a speed of 100 mi/hr. How long is the train as observed by a passenger who was left standing on the platform? Is length contraction observed? Explain your answer briefly.

Answer 1

Answer

Length of train

L=1km=1000m

Speed v=100mi/hr=44.74m/s

Now train take to pass passenger

$t=\frac{L}{v}\\=\frac{1000}{44.74}\\=22.35sec.$

No, the length will not contracted

Because it's velocity is not in order of speed of light.