A-LevelPhysicsForces, density and pressureMay/June 2017Paper 1 Q111 Mark
In a machine, many couples act on a rotating object as shown. [Figure shows a rotating object with various forces and their distances from the center. Forces are 50 N (at 6.5 cm and 12 cm), 25 N (at edges, 16 N (at 4.0 cm and 10 cm), 30 N (at edges).] What is the resultant torque acting on the rotating object?
A4.7 Nm
B8.6 Nm
C9.3 Nm
D17.1 Nm
✓ Correct Answer
The correct answer is C: 9.3 Nm
📋 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.
🔒
Unlock the Examiner's Analysis
Sign up for free to reveal the full examiner report, trap analysis, and mark scheme breakdown for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep