Objects A and B are at the origin. If object A moves to (5 ,-7 )(5,−7) and object B moves to (7 ,4 )(7,4) over 3 s3s, what is the relative velocity of object B from the perspective of object A? Assume that all units are denominated in meters.

1 Answer
ali ergin
Apr 4, 2016

v_a=(5sqrt5)/3" m/s"va=5√53 m/s

Explanation:

enter image source here
"the green vector shows displacement of B from the perspective of A"the green vector shows displacement of B from the perspective of A

Delta s=sqrt(2^2+11^2)" (green vector)"
Delta s=sqrt(4+121)
Delta s=sqrt125
Delta s=5sqrt5" m"

v_a=(Delta s)/(Delta t)

v_a=(5sqrt5)/3" m/s"

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