A-LevelPhysicsDynamicsOct/Nov 2015Paper 1 Q121 Mark
A mass of 0.20 kg is suspended from the lower end of a light spring. A second mass of 0.10 kg is suspended from the first mass by a thread. The arrangement is allowed to come into static equilibrium and then the thread is burned through. [Figure showing a spring with 0.20kg mass, and 0.10kg mass suspended below by a thread] At this instant, what is the upward acceleration of the 0.20 kg mass? (Assume g = 10 ms⁻².)
A5.0 ms⁻²
B6.7 ms⁻²
C10 ms⁻²
D15 ms⁻²
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of dynamics 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