Objects A and B are at the origin. If object A moves to $(-2 ,2 )$ and object B moves to $(-5 ,-6 )$ over $2 s$ , what is the relative velocity of object B from the perspective of object A?

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Answer 1 · 2016-04-17T10:28:10

$v=4,27 " "(unit)/s"$

$"angle is shown in figure"$

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$"displacement for B from perspective of A is:"$

$Delta s=sqrt((-5+2)^2+(-6-2)^2)$

$Delta s=sqrt((-3^2)+(-8)^2)$

$Delta s=sqrt(9+64)$

$Delta s=sqrt(73)$

$Delta s=8,54" unit"$

$"relative velocity :"$

$v=(Delta s)/(Delta t)$

$v=(8,54)/2$

$v=4,27 " "(unit)/s"$

$"angle is shown in figure"$

Objects A and B are at the origin. If object A moves to (-2 ,2 )(-2 ,2 ) and object B moves to (-5 ,-6 )(-5 ,-6 ) over 2 s2 s, what is the relative velocity of object B from the perspective of object A?