00:01
Question 54 deals with here two penguins.
00:06
So each of these lines with a little b kind of thing is what i'm calling a penguin at least.
00:10
So the penguin on the left is about to land on the ice flow.
00:14
Just before it lands, is its speed greater than, less than, or equal to its speed when it left the water? so this question is a little, i don't want to call it a trick question, but it's a little tricky if you can say, because there's two scenarios this can happen.
00:27
So your water can be much lower than your ice flow.
00:30
And the penguin jumps and has a displacement in height in the wide direction, or it can be pretty even with the ice flow such that our distance in our wide direction, the change in height at least is zero.
00:45
So there's two scenarios, non -zero and zero, displacement in the wide direction.
00:51
So if i call the region where it's level, part a, the scenario a at least, and where for part a, our distance and our y is zero.
01:04
We don't change any heights.
01:11
We can look at one of our kinematic equations.
01:14
We have velocity final, say, so for x, b, not x, you know, squared, squared, plus 2 ad to ax, dx.
01:26
Well, of course, we have no acceleration in our x direction...