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Question 17N.3.SL.TZ0.c

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.3.SL.TZ0.c
Level SL Paper 3 Time zone TZ0
Command term Identify Question number c Adapted from N/A
c.
[Maximum mark: 1]
17N.3.SL.TZ0.c

Two rockets, A and B, are moving towards each other on the same path. From the frame of reference of the Earth, an observer measures the speed of A to be 0.6c and the speed of B to be 0.4c. According to the observer on Earth, the distance between A and B is 6.0 x 108 m.

Identify the terms in the formula.

u′ =  u − v 1 − u v c 2

 

[1]

Markscheme

u and v are velocities with respect to the same frame of reference/Earth AND u′ the relative velocity

Accept 0.4c and 0.6c for u and v

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