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DYNAMICS - EXAMPLE


Joggers Direction
  Example

 

Two joggers, A and B, meet at a street corner and start jogging in different directions. Jogger A goes north at 4 mph and joggers b goes east at 6 mph. After 3 seconds, what is the relative velocity of jogger A with respect to jogger B?

 

   
    Solution


Relative Velocity Vector

  Location does not matter, relative velocity will be the same at t = 0 or t = 3 secs.
     vA = vA/B + vB
     4j = vA/B + 6i

vA/B = -6i + 4j mph
     
   
 
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