Two Rockets, a and B, Approach Each Other as Shown

question 20

Multiple Choice

Two rockets, A and B, approach each other as shown in the figure. A travels to the right at 0.7c while B travels to the left at 0.8c. Both speed measurements are made relative to an inertial observer.
-Determine the ratio of the kinetic energy of rocket B to its rest energy.

• A)0.80
• B)0.67
• C)0.54
• D)0.33
• E)0.25

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