00:01
Here, we're told that we have a particle and its velocity is 5 over the square root of t.
00:07
Now, i'm going to write that as 5t to the negative 1 half, just because it's easier in calculus to not use fractions and to not use square roots, because when you take the derivative, it's easier.
00:18
But it means the same thing.
00:20
Now, we want to find both the acceleration and position.
00:23
So to find the acceleration is going to be easy.
00:25
We just take the derivative.
00:27
A of t will be the derivative of this.
00:30
Which is a lot easier if we write it this way, because that's a power rule.
00:33
We just take the power out front, five times negative one -half is negative five -haves, t to the subtract one to the power, so negative three -haves.
00:43
And that's it.
00:43
That is the acceleration at any given time.
00:46
Now, the position isn't too bad either.
00:49
We have to take the integral this time, though.
00:52
The integral of this is, again, going to be a power rule...