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A-LevelPhysicsDynamics9702/12 · Oct/Nov 2014 · Q91 Mark

Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together. What is the speed of the trucks after the collision?

Av/4

Bv/2

Cv

D5v/4

✓ Correct answer

A: v/4

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About this question

Topic: Dynamics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2014 Paper 1 Variant 2, question 9.

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