Physics (AS & A Level) · May / June 2020 · Paper 11 · Question 17
A block of weight 80 N is pushed a distance of 60 cm up a slope inclined at 30° to the horizontal. There is a frictional force of 25 N between the block and the surface of the slope. What is the work Wg done against the gravitational force and the work Wf done against the frictional force?
- AWg = 24 J, Wf = 7.5 J
- BWg = 24 J, Wf = 15 J
- CWg = 48 J, Wf = 7.5 J
- DWg = 48 J, Wf = 15 J
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Correct answer: B. Wg = 24 J, Wf = 15 J
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