DP Physics (first assessment 2025)

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Question 22M.1A.SL.TZ1.9

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1A.SL.TZ1.9
Level SL Paper 1A Time zone TZ1
Command term Question number 9 Adapted from N/A
9.
[Maximum mark: 1]
22M.1A.SL.TZ1.9

Two trolleys of equal mass travel in opposite directions as shown.

The trolleys collide head-on and stick together.

What is their velocity after the collision?

A.  1 m s−1

B.  2 m s−1

C.  5 m s−1

D.  10 m s−1

[1]

Markscheme

A

Examiners report

The majority of SL candidates selected option B, finding the difference in velocity but neglecting to recognize that mass will have doubled. This question had a relatively high discrimination index suggesting more able candidates had greater success demonstrating this recognition.

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