Acar (of mass 1500 kg) and a small truck (of mass 2000 kg) collide suddenly at right angles at an icy intersection. the car was originally traveling eastward at 20.0 m/s and the truck was traveling northward at 20.0 m/s just before the collision took place. what is the speed of the combined wreck just after the collision if the vehicles become enmeshed?

The answer is 20.0 m/s. Let's explain why.

Explanation:

In the crash problems, the key is that the total moment is the same before and after the crash

and P is defined as

Let's say the car has mass and speed and the small truck has mass and speed.

Total moment before the crash would be:

And after the crash the it equals

As we said before total moment is equal before and after the crash.

=

Therefore

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