What is the speed of an object that travels from #( 7,-8,1) # to #( -1,4,-6 ) # over #2 s#?

1 Answer
Mar 1, 2016

Answer:

#v~=8,02 m/s#

Explanation:

#"1- we must find distance between the point of (7,-8,1)"##" and (-1,4,-6)"#
#Delta s=sqrt((-1-7)^2+(4+8)^2+(-6-1)^2)#
#Delta s=sqrt(64+144+49)" "Delta s=sqrt257 " m"#
#"2- now, we can calculate speed using : " v=(Delta s)/(Delta t)#
#v=sqrt 257/2#
#v~=8,02 m/s#