constant velocity

Question

If a meter stick moves to your right at a constant velocity of 0.8 c, what would you measure its length to be?  
0.4 m

0.6 m

0.8 m

1.0 m
 

Answer 1

The multiplier is square root of (1-(v/c)²

 = √(1 - 0.8²) = √(1 - 0.64) = √(0.36) = 0.6