0:00
We have a before and after sketch.
00:07
And we have the car here with an initial velocity.
00:14
We can say that then there is an initial momentum as well.
00:19
And we can say that then the car crashes into a wall.
00:27
And the final velocity is zero meters per second.
00:30
So it is at rest.
00:32
This would be our coordinate axes.
00:37
And so for part a, we can find the initial momentum of the car.
00:42
This would be equal to the mass times the initial velocity, giving us 60 .0 kilograms multiplied by 26 meters per second.
00:55
And this is giving us 1 .56 times 10 to the third kilograms meters per second.
01:06
And of course, the final momentum is equaling zero kilograms meters per second because, of course, the final velocity is equaling zero.
01:16
And so we can say that then, for part b, or rather, continuing on for part a, to find the force exerted on the person, we can say that then the force, we can use the impulse momentum theorem and say that the impulse is equal to the change in momentum, rather...