00:01
All right, so let's say we have a ball that is thrown upwards with a speed v, and we want to know at the highest point of its trajectory, what are its velocity and its acceleration? well, the highest point of its trajectory, we'll call this h, is kind of defined by the equation of, there are multiple ways of writing, v squared over 2g.
00:22
And v squared here is the initial velocity, because the final velocity is actually going to be zero.
00:29
In fact, what we can do is rewrite this.
00:32
So this should be the final velocity squared minus the initial velocity squared over to g.
00:38
That should be the change in height of the object.
00:41
But the final velocity, in this case, at the top of the trajectory, is going to be zero...