Solved: A dynamite blast at a quarry launches a chunk of

Chapter 2, Problem 2.81

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A dynamite blast at a quarry launches a chunk of rock straight upward, and 2.0 s later it is rising at a speed of 15 m/s. Assuming air resistance has no effect on the rock, calculate its speed (a) at launch and (b) 5.0 s after launch

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