00:01
In this problem, we have a force time graph.
00:05
And it goes from positive 4 through the first three seconds, and then down to negative 2, not drawn to scale.
00:13
This is 3, and this is at our 5 second mark.
00:17
And so for the first thing we wanted to know, which was found correctly, is what is the impulse? we know the area under the curb of a force time graph gives us our impulse.
00:25
And so if we were looking at this first area, it is a square.
00:30
We're looking for the first three seconds.
00:32
It is simply base times height.
00:35
So four times three, and that gives us 12 newtons per second.
00:40
The second one wants to know from 0 to 5 seconds.
00:44
And so we have this 12.
00:47
And we have to subtract this right here...