An object with mass ? = 2 ?? is released from rest at a height ℎ = 6 ? from the top of an inclined plane. It slides down the inclined plane without friction then slides across a rough surface with a coefficient of kinetic friction ?? = 0.4. (a) What is the speed of the object after it slides 4 meters across the rough surface? (b) How much work is done by friction over this distance?

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Chapter1: Units, Trigonometry. And Vectors
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An object with mass ? = 2 ?? is released from rest at a height ℎ = 6 ? from the top of an inclined plane. It slides down the inclined plane without friction then slides across a rough surface with a coefficient of kinetic friction ?? = 0.4. (a) What is the speed of the object after it slides 4 meters across the rough surface? (b) How much work is done by friction over this distance?

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