Friend of yours travels by you in his fast sports car at a speed of 0.550 c. It is measured in your frame to be 4.20 m long and 1.10 m high.
a) What will be its length and height at rest?
b) How many seconds would you say elapsed on your friend's watch when 10.0 s passed on yours?
c) How fast did you appear to be traveling to your friend?
d) How many seconds would he say elapsed on your watch when he saw 10.0 s pass on his?