A-LevelPhysicsForces, density and pressureMay/June 2019Paper 1 Q141 Mark
A car of mass m travels at constant speed up a slope at an angle θ to the horizontal, as shown in the diagram. Air resistance and friction provide a resistive force F. The acceleration of free fall is g. [Figure 14.1] What is the force needed to propel the car at this constant speed?
Amg cos θ
Bmg sin θ
Cmg cos θ + F
Dmg sin θ + F
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The correct answer is D. This question tests the candidate's understanding of forces, density and pressure within the Physicssyllabus. The examiner's mark scheme requires...
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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...
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