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

"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