00:01
So in this question, we have that a gun is fired at an angle of 30 degrees.
00:07
And we're asked to determine what's the speed, if the maximum height it will reach is 500 meters.
00:16
So first of all, we know that the y component of the initial velocity, we need to determine that.
00:24
So you know that sign of theta, so we have our little triangle right here.
00:28
So we have this angle of 30.
00:31
This is vi, and we want to find the y component of v.
00:37
So sine theta is just opposite over hypotenuse, so it's just the y component of vi divided by vi.
00:48
So that means that vii, y hat is vi sine theta, a sine 30.
00:53
We know sign of 30 is one half...