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Question

A particle moves according to the equation x=t2+3t+4 . The average velocity in the first 5 s is
  1. 6.4 ms1
  2. 5.8 ms1
  3. 7.6 ms1
  4. 8 ms1


Solution

The correct option is D 8 ms1
Average velocity after 5 seconds is:
¯v=x5x05=25+15+445=8 m/s 
 

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