A-LevelMathematicsMechanics9709/41 · Oct/Nov 2024 · Q14 Marks
Two particles, of masses 1.8 kg and 1.2kg, are connected by a light inextensible string that passes over a fixed smooth pulley. The particles hang vertically. The system is released from rest. Find the magnitude of the acceleration of the particles and find the tension in the string.
- Find the magnitude of the acceleration of the particles and find the tension in the string.[4]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2024). The mark or mark type is shown in brackets.
- *M1 Use of Newton's second law for either particle or system
- A1 T-1.2g=1.2a 1.8g-T=1.8a 1.8g-1.2g = (1.2+1.8)a
- DM1 For attempt to solve for T
- A1 a = 2ms⁻² T=14.4N
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