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?

1 Answer
Apr 17, 2016

Answer:

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

#"angle is shown in figure"#

Explanation:

enter image source here

#"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"#