So we made it a separate post.
- It is also mentioned in
- When a lighter car crosses the path of a heavier car/truck and the lighter vehicle is struck in the side by the heavier vehicle.
- If the heavier striking car/truck happens to swerve before the impact, either to the left or the right, the degree or two of change of impact angle can result in dramatic changes in the results of a linear momentum solution.
- The swerve by the heavier vehicle will produce a change in the separation angles. The change in separation angles, if all attributed to the smaller vehicle speed
- Which it will be if the impact angle of the striking heavier vehicle is assumed to be 0 (zero) degrees and/or it the collision is assumed to be a at a 90 degree impact
The result Depends on the direction of the swerve!,
The small vehicle will be 'reconstructed' as either- Going very fast in the forward or
- Going very fast in the reverse direction,
All depends on the direction of any pre-impact swerve by the truck OR if the impact is NOT perfectly 90 degrees.
Depending on the difference in the weights of the vehicles
AND- Assumption (or not) for (pre-impact swerve? or not) affecting the impact angle (or not) of the heavier vehicle...
- Any angularity in the actual impact
- If a small change in an angle makes a dramatic change in the results then obviously you need to focus on defining and refining the inputs as well as consider using a more sophisticated solution procedure
- Like msmac3D in which you simulate ANY pre-impact swerve AND simulate the structural interaction between the vehicles FOR EVERY MILLISECOND during the collision (NOT instantaneous momentum exchange at a point)
- Test and refine any instantaneous momentum results with something like a SMAC simulation which is essentially like running a mathematical full-scale crash test and can therefore test the effects of swerving the larger heavier vehicle to the left or right.