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A steel ball of mass 0.840 kg is fastened to a cord that is 75.0 cmlong and fixed at the far end. The ball is then released when thecord is horizontal (Fig. 9-68). At the bottom of its path, the ballstrikes a 2.40 kg steel block initially at rest on a frictionless surface. The collision is elastic.Find (a) the speed of the balland (b) the speed of the block, both just after the collision.

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Category:- Physics
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