Physics (AS & A Level) · May / June 2026 · Paper 13 · Question 10

A rock of mass 2m, travelling in deep space at velocity v, explodes into two parts of equal mass, one of which is then stationary. What is the kinetic energy of the moving part after the explosion?

1. A$\frac{1}{2}mv^2$
2. B$mv^2$
3. C$\frac{3}{2}mv^2$
4. D$2mv^2$

As printed in the paper