What is the speed of an object that travels from #( -4,6,1) # to #( 9,3,7 ) # over #2 s#?

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Answer 1 · 2018-06-21T07:54:26

The speed is #=7.31ms^-1#

The speed is

#v=d/t#

The distance is

#d=sqrt((9-(-4))^2+(3-6)^2+(7-1)^2)#

#=sqrt(13^2+3^2+6^2)#

#=sqrt(214)#

#=14.63m#

The speed is

#v=14.63/2=7.31ms^-1#