00:01
Hi there, so for this problem, we are told that a car with a mass, let's label this as lowercase m, is 1 ,000 kilograms, and it is troubling west at 17 meters per second.
00:18
Now, let me just draw this situation in here.
00:22
We'll have west, north, east, and south.
00:27
We're going to set east to be the positive edge disruption.
00:31
West to be the negative x direction, north to be the positive y direction, and south to be the negative y direction.
00:45
We're also giving a trunk with the mass of 1 ,500 kilograms.
00:56
And the truck is traveling north at 20 meters per second.
01:03
So the velocity of this trunk, let me just write as the velocity, is just, 20 meters per second in the y direction.
01:16
Now the velocity of the card is troubling west, so that will be negative, 17 meters per second in the ads eruption.
01:31
The question for this, since they steep together, is where is their speed after the collision? for this we use conservation of momentum.
01:43
We know that initial momentum in beta vector form equals to the final momentum.
01:48
Now the initial momentum is the mass of the car times its velocity plus the mass of the trunk time its velocity and this equals to...