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Question : During operation the breaker hammer develops on the concrete...

During operation the breaker hammer develops on the concrete surface a force which is indicated in the graph. To achieve this the spike S of weight W is fired from rest into the surface at speed v. Determine the speed of the spike just after rebounding. Given: W = 2 lb , v = 200 ft/s , g = { 32.2ft/s }^{ 2 }

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