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

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Answer 1 · 2017-06-21T05:24:13

The speed is $=2.92ms^-1$

The distance is

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

$=sqrt(4+64+9)$

$=sqrt77$

The time is $t=4s$

The speed is

$v=sqrt77/3=2.92ms^-1$

What is the speed of an object that travels from ( 8 , 4, 5 ) ( 8 , 4, 5 ) to ( 6 , -4, ,2 ) ( 6 , -4, ,2 ) over 4 s4 s?