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Question 19M.3.SL.TZ2.7ci

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.3.SL.TZ2.7ci
Level SL Paper 3 Time zone TZ2
Command term Determine Question number ci Adapted from N/A
ci.
[Maximum mark: 2]
19M.3.SL.TZ2.7ci

A spaceship moves away from the Earth in the direction of a nearby planet. An observer on the Earth determines the planet is 4 ly from the Earth. The spacetime diagram for the Earth’s reference frame shows the worldline of the spaceship. Assume the clock on the Earth, the clock on the planet, and the clock on the spaceship were all synchronized when ct = 0.

(ci)

Determine, according to an observer on the spaceship as the spaceship passes the planet, the time shown by the clock on the spaceship.

[2]

Markscheme

OR

Allow solutions involving the use of Lorentz equations.

Examiners report

A very simple time dilation question which most candidates got wrong at SL but the question was better answered at HL.

Syllabus sections