A block with a mass (m_{1}=6.0 mathrm{~kg}) sitting on a frictionless table is connected to a suspended

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 A block with a mass \(m_{1}=6.0 \mathrm{~kg}\) sitting on a frictionless table is connected to a suspended mass \(m_{2}=2.0 \mathrm{~kg}\) by a light string passing over a frictionless pulley. Using energy considerations, find the speed at which \(\mathrm{m}^{2}\) hits the floor after descending \(0.75 \mathrm{~m}\). (Note: A similar problem in Example 4.6 was solved using Newton's laws.)

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