SOLUTION: 5. A comet is flying at a speed of 400 m/s when it reaches the earth’s orbit and starts accelerating toward the earth with a=30 m/s2 for time t=8 s. What is its final speed?

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Question 387413: 5. A comet is flying at a speed of 400 m/s when it reaches the earth’s orbit and starts accelerating toward the earth with a=30 m/s2 for time t=8 s. What is its final speed?

Answer by Alan3354(30993) About Me  (Show Source):
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5. A comet is flying at a speed of 400 m/s when it reaches the earth’s orbit and starts accelerating toward the earth with a=30 m/s2 for time t=8 s. What is its final speed?
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30 m/sec/sec x 8 seconds = 240 m/sec
400 + 240 = 640 m/sec