O-LevelPhysicsEnergy & WorkOct/Nov 2025Paper 1 Q161 Mark
A rocket has mass M when empty. The rocket carries an additional mass M of fuel. The rocket and fuel travel at a speed v. When the engine of the rocket is fired, all of the fuel is expelled and the speed of the rocket increases to 2v. What happens to the kinetic energy of the rocket?
AIt doubles.
BIt halves.
CIt increases by a factor of four.
DIt stays the same.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of energy & work within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep