00:01
Problem.
00:01
8.41.
00:03
We have a collision between a yellow subcompact car and a red pickup truck which will call a and b, respectively.
00:12
They were initially moving well.
00:15
The the compact car was initially moving east.
00:19
Pickup truck was originally moving north and then they collide and stick together and move off at 16 meters per 2nd 24 degrees east of north.
00:32
And since we're calling this x in this why, it's worth noting that this angle is measured from the positive.
00:41
Why direction? and so, whereas we'd normally expect to have a co sign for the x component of this, for example, we're actually going to use the sign because it's 90 degrees minus.
00:54
This is 90 degrees minus this ankle.
00:59
So we know that the white component for this one is zero initially.
01:03
Similarly, the x component for this 10 initially, then from this and then being careful with using sign for x and co sign for why we know that or we can readily compute that.
01:23
The x component of the final velocity is six and 1/2 meters per second, and the white components is 14.6 meters per second and now this is a pretty simple exercise in the conservation of momentum because we know that the initial velocity velocities of either one have a zero.
02:07
Why or x component? so we take the equation for the x component of the momentum.
02:16
For example, the contribution from the pickup truck is going to be zero.
02:27
So we just have the mass of the compact car...