Author Question: An Earth observer sees a spaceship at an altitude of 980 m moving downward toward the Earth at a ... (Read 150 times)

skymedlock · **on:** Jul 28, 2018

An Earth observer sees a spaceship at an altitude of 980 m moving downward toward the Earth at a speed of 0.600c. What is the spaceship's altitude as measured by an observer in the spaceship?
a. 588 m
c. 1630 m
b. 784 m
d. 1270 m

Question 2

A rocket ship is 74.0 m in length when measured before leaving the launching pad. What would its velocity be if a ground observer measured its length as 60.0 m while it is in flight? (c = 3.00 108 m/s)
a. 1.76 108 m/s
c. 1.98 108 m/s
b. 0.980 108 m/s
d. 1.15 108 m/s