Laws Of Motion Question 71
Question: A stick of 1 m is moving with velocity of $ 2.7\times 10^{8}m{{s}^{-1}} $ . What is the apparent length of the stick $ (c=3\times 10^{8}m{{s}^{-1}}) $ [BHU 1995]
Options:
A) 10 m
B) 0.22 m
C) 0.44 m
D) 2.4 m
Show Answer
Answer:
Correct Answer: C
Solution:
$ l=l _{0}\sqrt{1-\frac{v^{2}}{c^{2}}} $
$ =1\sqrt{1-{{( \frac{2.7\times 10^{8}}{3\times 10^{8}} )}^{2}}}\Rightarrow l=0.44\ m $
