Physics (AS & A Level) · Feb / March 2025 · Paper 12 · Question 7

Objects P and Q form an isolated system. Object P has mass 6.0 kg and is moving at a speed of 3.0 m s⁻¹. Object Q has mass 2.0 kg and is moving at a speed of 4.2 m s⁻¹ at an angle of 35° to the path of P. Objects P and Q collide and stick together. What is the magnitude of the component of the final momentum of the combined objects in the original direction of P?

1. A9.6 kg m s⁻¹
2. B11 kg m s⁻¹
3. C13 kg m s⁻¹
4. D25 kg m s⁻¹

As printed in the paper