Objects A and B are at the origin. If object A moves to #(-3 ,8 )# and object B moves to #(-6 ,-1 )# 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.

1 Answer
Mar 27, 2016

Answer:

#"see animation"#
#"the velocity of B from perspective of A :" v=3,16" m/s"#

Explanation:

enter image source here
#Delta x=-6-3=-3" m"#
#Delta y=-1-8=-9" m"#
#"displacement between the points A and B:"#
#a=sqrt(Delta x^2+Delta y^2)#
#a=sqrt((-3)^2+(-9)^2)#
#a=sqrt(9+81)#
#a=sqrt90#
#a=9,49" m"#
#v=a/(Delta t)#
#v=(9,49)/3#
#v=3,16" m/s"#