Mathematics (AS & A Level) · May / June 2016 · Paper 42 · Question 5
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T N 30Å 20Å A block of mass 2.5 kg is placed on a plane which is inclined at an angle of 30Å to the horizontal. The block is kept in equilibrium by a light string making an angle of 20Å above a line of greatest slope. The tension in the string is T N, as shown in the diagram. The coefficient of friction between the block and plane is 1 4. The block is in limiting equilibrium and is about to move up the plane. Find the value of T. [7]
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