What is the speed of an object that travels from #( -9,0,1) # to #( -1,4,-6 ) # over #2 s#?

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Answer 1 · 2016-09-27T13:05:01

#"The speed of object is : "v=5.68 " unit"/s#

#"Speed of an object is given as " v=("distance")/("time elapsed")#

#"distance between (-9,0,1) and (-1,4,-6) is:"#

#Delta x=sqrt((-1+9)^2+(4-0)^2+(-6-1)^2)#

#Delta x=sqrt(8^2+4^2+(-7)^2)#

#Delta x=sqrt(64+16+49)#

#Delta x=sqrt(129)#

#Delta x=11.36" unit"#

#v=(11.36)/(2)#

#v=5.68 " unit"/s#