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

1 Answer
Sep 27, 2016

Answer:

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

Explanation:

#"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#