DP Physics (first assessment 2025)

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Question 23M.2.SL.TZ1.4cii

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Date May 2023 Marks available [Maximum mark: 2] Reference code 23M.2.SL.TZ1.4cii
Level SL Paper 2 Time zone TZ1
Command term Determine Question number ii Adapted from N/A
ii.
[Maximum mark: 2]
23M.2.SL.TZ1.4cii
(ii)

Determine, using the diagram or otherwise, the space coordinate x′ of event R in S′.

[2]

Markscheme

ALTERNATIVE 1

Using diagram:

line from R parallel to prime ct axis until it intersects space axis ✓

use of scale from (b) to estimate coordinate to x' = (1.3 ± 0.2) ly ✓

 

ALTERNATIVE 2

Using Lorentz transformation:

event R has coordinates x = ct = 4.00 ly in S ✓

so x' = «y(x − vt) = 53 × (4.00 − 0.80 × 4.00)» = 1.33 ly ✓

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