00:01
So giving this position function, i think 10t squared plus 2t plus 5, a little hook on my t so they look like, so they don't look like plus signs.
00:17
I also don't like that they use s in the problem because my ss look like fives.
00:21
But the derivative of that position function is equal to velocity.
00:28
And that's just bringing the two in front.
00:31
So we're looking at negative 20 because negative 10 times 2 is negative 20.
00:35
And then the derivative of 2t is 2.
00:38
The derivative of 5 is 0.
00:40
No need to write that down.
00:42
So this is part of your first answer.
00:44
It's part of a.
00:47
The other part i'm about to do, which is where they ask for acceleration.
00:53
Well, acceleration is the derivative of velocity...