What is the speed of an object that travels from #( -9,0,1) # to #( -1,4,-6 ) # over #2 s#? Physics 1D Motion Displacement and Velocity 1 Answer ali ergin 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# Answer link Related questions What is the difference between distance and displacement? Is displacement directly proportional to velocity? How does average velocity differ from instantaneous velocity? How can I calculate the change of velocity? How do speed and velocity differ from each other? How do velocity and acceleration differ? How do displacement and distance differ? Can displacement be negative? Can velocity be zero if accelerating? Explain why displacement is a vector quantity? See all questions in Displacement and Velocity Impact of this question 202 views around the world You can reuse this answer Creative Commons License