A-LevelPhysicsWork, energy and powerOct/Nov 2019Paper 1 Q141 Mark
The gas in an engine does work on a piston of cross-sectional area 80 cm². The pressure on the piston has a constant value of 4.6 × 10⁵ Pa. [Figure showing a piston moving 25 cm, with 'force of gas pushing piston'] How much work is done by the gas on the piston when it moves through a distance of 25 cm?
A9.2 × 10² J
B9.2 × 10⁴ J
C9.2 × 10⁶ J
D9.2 × 10⁸ J
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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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