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32. A block of mass 100 g is moved with ...

32. A block of mass 100 g is moved with a speed of 5-0 m/sat the highest point in a closed circular tube of radius10 cm kept in a vertical plane. The cross-section of thetube is such that the block just fits in it. The blockmakes several oscillations inside the tube and finallystops at the lowest point. Find the work done by thetube on the block during the process.

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