What is the speed of an object that travels from $( 8 , 2,6 )$ to $( 5 , -4 ,1 )$ over $2 s$ ?

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Answer 1 · 2016-01-02T18:16:51

$4.18"units/s"$

The distance between the points is given by:

$d=sqrt((8-5)^2+(2-(-4))^2+(6-1)^2$

$:.d=sqrt(3^2+6^2+5^2)=sqrt(70)=8.36"units"$

So the speed will be:

$v=d/t=8.36/2=4.18"units/s"$

What is the speed of an object that travels from ( 8 , 2,6 ) ( 8 , 2,6 ) to ( 5 , -4 ,1 ) ( 5 , -4 ,1 ) over 2 s2 s?