Mathematics (AS & A Level) · May / June 2017 · Paper 42 · Question 1
9709
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One end of a light inextensible string is attached to a block. The string makes an angle of 1Å with the horizontal. The tension in the string is 20 N. The string pulls the block along a horizontal surface at a constant speed of 1.5 m s−1 for 12 s. The work done by the tension in the string is 50 J. Find 1. [3]
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