A block of weight mg = 300 N is sitting on a horizontal floor. The coefficient of kinetic friction …

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A block of weight mg = 300 N is sitting on a horizontal floor. The coefficient of kinetic friction is μ = 0.3. 1. With how much force do I need to pull the block horizontally in order to keep it moving at a constant non-zero velocity? [1 mark] 2. How much work will I need to do in order to move the block by 10 m in a straight horizontal line, while pulling horizontally and moving the block at a constant velocity? [2 marks] 3. At what angle θ from the horizontal should I pull the block in order to minimize the total work I need to do in order to move the block by 10 m in a straight horizontal line at a constant non-zero velocity, and what will that work be? [7 marks]

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  1. Thomas Carlson
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