00:01
All right, so let's say a football is thrown with a speed, we'll call v, and we're told in the x direction, it has a speed of 20 meters a second, and in the y direction, it has a speed of 12 meters a second.
00:16
We want to know how much time is required for the football to reach the highest point.
00:20
So we'll call this t.
00:22
This is just going to be the speed in the y direction, divided by the acceleration, due to gravity.
00:28
So 12 meters a second over 9 .8 meters per second squared.
00:36
So this is 1 .22 seconds.
00:41
And then we want to know how high is this point.
00:43
So this height is just going to be vy squared over 2g.
00:51
So there should be about 7 .35 meters...