Objects A and B are at the origin. If object A moves to $(0 ,-3 )$ and object B moves to $(9 ,-3 )$ 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 · 2017-04-12T15:12:43

The relative velocity is $=<3,0>$

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The absolute velocity of $A$ is

$vecv_A=1/3<0,-3>=<0,-1>$

The absolute velocity of $B$ is

$vecv_B=1/3<9,-3>=<3,-1>$

The relative velocity of $B$ with respect to $A$ is

$vecv_(B//A)=vecv_B-vecv_A$

$=<3,-1> - <0,-1>$

$=<3,0>$

Objects A and B are at the origin. If object A moves to (0 ,-3 )(0 ,-3 ) and object B moves to (9 ,-3 )(9 ,-3 ) over 3 s3 s, what is the relative velocity of object B from the perspective of object A? Assume that all units are denominated in meters.