00:01
This problem, we're going to talk about project tiles.
00:02
And what we need to remember is that, consider that here in this graph, we have the graph of the height, i'm going to call it y, of the project tile as a function of the range x.
00:22
And project tile trajectory will look something like this, blue curve here, i'm going to call it h and the range, i'm just going to call it capital x.
00:42
The maximum height h is equal to v0 squared.
00:46
This is the initial speed of the project tile squared times the sign squared of theta, and theta here is just the initial angle, divided by two times g, while capital x is equal to v0 squared times the sine of 2 times theta divided by g.
01:15
And what we have in our problem is a situation in which the range, capital x, of the project tile is equal to three times the maximum height h.
01:29
And i'm going to find what was the initial angle theta...