00:01
First, let's try to find how long the key is falling for.
00:04
And so we can say that then we can say y final equaling y initial plus vy initial t minus 1⁄2t minus 1⁄2t squared.
00:17
And in this case, we can simply say that here, there isn't any velocity y initial for the key because it starts from rest at 45 meters above the surface, or rather above the level of the boat.
00:34
And so we can eliminate this term.
00:36
We're going to say that y final is the surface, the level of the boat.
00:41
And so if it's falling to the boat, our y final is also zero.
00:46
So we can then say that here our y initial is equaling 1 half gt squared.
00:55
And in this case, the time it takes for the time it takes for the, the key to drop would be the square root of two times that initial height divided by g...