0:00
Okay.
00:02
This one's kind of fun.
00:03
Conceptually, it's kind of challenging.
00:05
Grasshopper jumps up, straight up, goes up, comes back down.
00:10
One thing to note, when the grasshopper goes up, the only thing slowing it down is gravity.
00:17
And when the grasshopper comes down, the only thing speeding it up is gravity.
00:22
And so on the way up, you have the force of gravity bringing it down.
00:29
And then on the way down, you have the force of gravity still pulling it down.
00:34
And even when it's in the middle, that brief moment where it actually stops, you still have the force of gravity pulling it down.
00:41
That's the whole reason it stopped.
00:44
And so everywhere on its path, gravity is pulling it down.
00:47
And so here, on the way up, your acceleration is gravity, and that's negative 9 .8 meters per second squared.
00:59
At the top, your velocity is zero, but your acceleration is still gravity is still negative 9 .8.
01:11
And then on the way down, your acceleration is still gravity and that's still negative 9 .8 meters per second squared...