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Please help. I do not understand A bucket of water of mass '15 kg is pulled at constant velocity up to a platform 25 meters

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Please help. I do not understand

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A bucket of water of mass '15 kg is pulled at constant velocity up to a platform 25 meters above the ground. This takes 10 minutes, during which time 8 kg of water drips out at a steady rate through a hole in the bottom. Find the work needed to raiSe the bucket to the platform. {USe g = 9.8mf82J Work :D {include units]

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