A-LevelPhysicsWork, energy and powerOct/Nov 2021Paper 1 Q171 Mark
An object slides with constant velocity across a horizontal sheet of ice. Friction is negligible. A constant horizontal force of 2.1 N is then applied to the object as shown. [Figure 17.1] A short time after applying the force, the object reaches point X at a displacement of 4.0 m from its position when the force was first applied. What is the work done by the force on the object as it travels to point X?
A4.2 J
B4.8 J
C7.3 J
D8.4 J
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The correct answer is C. 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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