A1,550 kg car moving south at 10.0 m/s collides with a 2,550 kg car moving north. the cars stick together and move as a unit after the collision at a velocity of 5.22 m/s to the north. fins the velocityof the 2,550 kg car before the collision.

14.47 m/s

Explanation:

The momentum must be preserved before and after the collision:

The total momentum before the collision

where are the masses of the car moving south and north, respectively, before the collision. is the velocity of the car moving South. We take the velocity to the North as the positive direction

The total momentum after the collision

where V = 5.22m/s is the velocity of both cars after the collision

We can equalize the 2 equations and plug in the numbers:

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explanation: