# What is the speed of an object that travels from #( 4,-2,2) # to #( -3, 8,-7 ) # over #3 s#?

##### 1 Answer

#### Answer:

The answer would be the distance between the two points (or vectors) divided by the time. So you should get

#### Explanation:

To get the distance between the two points (or vectors), just use the distance formula

ie *( note : it does not matter which way around we substract the points since the formula uses squares and thus eliminates any negative signs. We can do point A - point B or point B - point A)*

Now applying the distance formula, we get

Then all that is left is to divide by the time to get the answer.

**Interesting fact:** This distance formula is actually called the Euclidean Norm in the real normed space