Answers

2014-04-22T21:28:34+08:00
The solution of acceleration is to multiply the final velocity to the intial velocity then divide time 
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2014-04-23T17:54:05+08:00
The solution of the acceleration subtract the final velocity  and the initial velocity then divide it on the time ex.
   a=Vf-Vi
          t
   a=16 sec/m-19 sec/m
               1 min
          -3 sec/m / 1 min = -3 sec/m/min
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