Objects A and B are at the origin. If object A moves to #(-3 ,-1 )# and object B moves to #(-7 ,8 )# over #3 s#, what is the relative velocity of object B from the perspective of object A? Assume that all units are denominated in meters.

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Answer 1 · 2016-05-10T16:00:09

#v=3.28m/s#

#alpha=113.96 ^o#

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#" displacement of B from perspective of A :"#
#AB=sqrt(9^2+4^2)#
#AB=sqrt(81+16)#
#AB=sqrt97#
#AB=9.85 " "m#

#v=(AB)/(time)#

#v=(9.85)/3#

#v=3.28m/s#

#alpha=113.96 ^o#