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A-LevelPhysicsWork, energy and powerOct/Nov 2020Paper 1 Q161 Mark

A ball is thrown vertically upwards. Air resistance is negligible. Which statement is correct?

ABy the principle of conservation of energy, the total energy of the ball is constant throughout its motion.
BBy the principle of conservation of momentum, the momentum of the ball is constant throughout its motion.
CThe kinetic energy of the ball is greatest at the greatest height attained.
DThe potential energy of the ball increases at a constant rate during its ascent.

✓ Correct Answer

The correct answer is A: By the principle of conservation of energy, the total energy of the ball is constant throughout its motion.

📋 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...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Physics Question

Topic

This multiple-choice question tests Work, energy and power in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2020 examination, Paper 1 Variant 2.

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