Mathematics (AS & A Level) · May / June 2025 · Paper 45 · Question 1
9709
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A box of mass 25 kg is pulled 12 m up a rough plane inclined at an angle of 8° to the horizontal. The box moves up a line of greatest slope against a frictional force of 50 N. The force pulling the box is parallel to the line of greatest slope. The box starts from rest and has speed 2.4 m s–1 at the end of the 12 m. Find the work done by the pulling force. [4]
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