# Dynamics: Collision

A dynamics student is called on to investigate a two car collision. It is known that car A sruck car B (see attahment). mA = 2000 kg and mB = 1200 kg. Both cars A and B then skidded 8.0 m. It apears from the damage that car A struck car B at a relative speed of 12 m/s.

Find the speed of car A just before collision. Assume a purely plastic collision (e = 0) and a coefficient of friction between the cars and the road of 0.7.

Â© BrainMass Inc. brainmass.com March 4, 2021, 10:58 pm ad1c9bdddfhttps://brainmass.com/physics/work/dynamics-two-car-collision-380314

#### Solution Preview

Solution: As the principle of conservation of linear momentum is applicable even in case of perfectly plastic collision; net linear momentum before collision = net linear momentum after collision

mAuA + mBuB = mAvA + mBvB .......(1) where u and v (with ...

#### Solution Summary

The expert examines dynamics of a two car collision. The solution provides a step by step solution provided.