A-LevelPhysicsWork, energy and powerOct/Nov 2023Paper 1 Q151 Mark
An electric car travels at a constant speed of 70 km h⁻¹ for 80 km on a straight horizontal road and uses energy E from its battery. The total resistive force acting on the car is proportional to (speed)² Assume that the electric motor is 100% efficient. How much energy is used from the battery when the car travels at a constant speed of 60 km h⁻¹ for 80 km on the straight horizontal road?
A0.73 E
B0.86 E
C1.2 E
D1.4 E
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The correct answer is A. This question tests the candidate's understanding of work, energy and power 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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