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A plane cruising at 251 m/s accelerates at25 m/s2 for 9 s.What is its final velocity?Answer in units of m/s

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The increase in speed is 25*9 = 225 m/s
Add that to the 251 m/s initial velocity.

The final velocity will be supersonic. This is hardly "cruising" unless it is a fighter jet or SST.

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