Objects A and B are at the origin. If object A moves to #(-5 ,-3 )# and object B moves to #(-1 ,-8 )# over #4 s#, what is the relative velocity of object B from the perspective of object A?

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Answer 1 · 2016-04-17T19:00:33

#v=1,6 " "(unit)/s#
#angle=308,66 ^o#
#"you can find from the triangle of ABC" ( tan A)"#

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#"the green vector shows displacement for the object B from"#
#"the perspective of A"#

#AB=sqrt((-1+5)^2+(-8+3)^2#

#AB=sqrt(4^2+(-5)^2)#

#AB=sqrt(16+25)#
#AB=sqrt41#

#AB=6,40 " unit"#

#v=(6,40)/4#

#v=1,6 " "(unit)/s#

#angle=308,66 ^o#
#"you can find from the triangle of ABC" ( tan A)"#