What is the speed of an object that travels from $( -1, 7,2)$ to $( -3, -1,0 )$ over $2 s$ ?

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Answer 1 · 2016-01-01T16:19:12

$4.24"units/s"$

The distance between the 2 points is given by:

$d=sqrt((-1+3)^2+(7+1)^2+(2-0)^2$

$:.d=sqrt(2^2+8^2+2^2)$

$d=sqrt(72)=8.48"units"$

$:.v=d/t=8.48/2=4.24"units/s"$

What is the speed of an object that travels from ( -1, 7,2) ( -1, 7,2) to ( -3, -1,0 ) ( -3, -1,0 ) over 2 s2 s?