Two rocket ships are racing toward Earth, as shown in the figure. Ship A is in t

Question

Two rocket ships are racing toward Earth, as shown in the figure. Ship A is in the lead, approaching the Earth at v1 = 0.81c and separating from ship B with a relative speed of 0.50c.

A. As seen from Earth, what is the speed, v, of ship B?

B. If ship A increases its speed by 0.10c relative to the Earth, does the relative speed between ship A and ship B increase by 0.10c, by more than 0.10c, or by less than 0.10c?

a. increase by more than 0.10c

b. increase by 0.10c    

c. increase by less than 0.10c

C. Find the relative speed between ships A and B for the situation described in part (b).

Explanation / Answer

A.)speed of ship B = 0.81C - 0.50C = 0.31C

B.) relative speed between ship A and ship B increase by 0.10c

c.) relative speed between B and A = 0.50C + 0.10 C = 0.60C

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