The discussion revolves around calculating the final velocity of two vehicles, a car and a van, after a completely inelastic collision. The car has a mass of 1500 kg and is traveling east at 25 m/s, while the van has a mass of 3000 kg and is traveling south at 16.7 m/s.
Several participants have provided insights into the momentum conservation principles relevant to the problem. There is an ongoing exploration of how to set up the equations for momentum before and after the collision, with no explicit consensus reached on the final approach.
Some participants have acknowledged previous misunderstandings regarding the nature of the collision, clarifying that it is completely inelastic, meaning the vehicles stick together post-collision. There is also a recognition of the need to consider the components of momentum separately for accurate calculations.
superdave said:
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...You have two vehicles, and you know their weights and speeds...if you look at one vehicle individually you will notice that by considering east and south as the components of velocity this vehicle really only has one component (either east or south)...from this you can say what both vehicles momentums are in either direction (note that if you are focusing on south, the car can be considered at rest, ie: it has no component of it's velocity in this direction)...after collision this momentum is conserved (for each component) but you now have 2 vehicles that move as one (ie: one object), this one object weighs as much as both objects before collision and will now move both east and south. The final speeds in these directions will allow you to find the resultant velocity and hence find [tex]\theta[/tex]GregA said:
