A1000-kg car traveling at 66 m/s hits a 2000-kg car at rest and the two travel together after the collision. calculate the speed with which they move.

v = 22 m/s

Explanation:

As we know that since there is no external force on the system of two cars

so we can say that momentum of two cars will be conserved

so here we can say

so we have

so we can say that final speed of both cars will be 22 m/s