Answers edited by Peter A.

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• A rocket with a satellite accelerates upward from the earth's surface. At 1.15 sec. after liftoff, the rocket clears the top of its launch platform, 63 m above the ground. What is the magnitude of the average velocity of the rocket for the 4.75 s flight?
  
• Question #0b63a
  
• What is the SI for a unit of power?