00:01
With this problem, we're going to talk about gravity acceleration.
00:03
Remember that for all bodies, gravity's acceleration, g is equal to 9 .8 meters per second squared.
00:14
Also, remember that according to torichetti's formula, the speed squared of a particle is equal to its initial speed, plus two times the acceleration times the displacement from the original position.
00:32
In our case, i'm going to consider that the y -axis is pointing upwards, and for that reason, the gravitational acceleration is pointing downwards, meaning that the acceleration is minus g, so v squared is equal to v -0 squared minus 2a delta.
00:54
And in this case, it's delta y, because i'm working with the y -axis.
00:58
Okay, so i'm going to write it as y here as well...