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Question 17N.3.SL.TZ0.5e.i

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Date November 2017 Marks available [Maximum mark: 2] Reference code 17N.3.SL.TZ0.5e.i
Level SL Paper 3 Time zone TZ0
Command term Determine Question number e.i Adapted from N/A
e.i.
[Maximum mark: 2]
17N.3.SL.TZ0.5e.i

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.

(e.i)

Determine, according to an observer in A, the time taken for B to meet A.

[2]

Markscheme

γ = 1.25

so the time is t = 1.6 «s»

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