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Two cars are on a level air track. They have the same mass as each other....

Two cars are on a level air track. They have the same mass as each other. The red car is given a push so that it moves toward the blue car with an initial speed of 2 m/s, while the blue car is given a push so that it moves toward the red car with an initial speed of 4 m/s. If the cars completely stick together, find their combined speed after the collision.

2.

This is an inelastic collision, so some energy must be lost. Find how much, and suggest where it could have gone.

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