00:01
All right, so we've got this velocity versus time graph of some object that is undergoing some transformations.
00:08
So it's going from a speed of a to a speed of b at point b.
00:14
It's getting faster, which means that the acceleration is going to be in the positive direction.
00:20
So i'm going to do acceleration in red, and i'm just going to draw a little arrow to represent what that is.
00:26
From b to c, the speed does not change.
00:29
So according to this graph, there is no acceleration.
00:34
There's no direction for the acceleration from b to c.
00:39
Then from c to d, we are reducing our speed.
00:44
Our speed is going from positive to negative.
00:46
And so all along here, our slope is negative.
00:50
And so we're going to have the acceleration in the negative direction...