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Posted by on Saturday, November 13, 2010 at 10:23pm.

A 11.0kg weather rocket generates a thrust of 230N . The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 510 N/m , is anchored to the ground. After the engine is ignited, what is the rocket's speed when the spring has stretched 40.0cm ?

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