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A rocket with initial mass 8000 kg is fi...

A rocket with initial mass 8000 kg is fired vertically. Its exhaust gases have a relative velocity of 2500 m/s and are ejected at a rate of 40kg/s. (a) What is the initial acceleration of therocket? (b) What is its acceleration after 20 s have elapsed.

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The correct Answer is:
`[2.7 m//s^(2),4.1 m//s^(2)]`
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