Bill forgets to put his car in park, and it starts rolling forward. When it is moving at a speed of 2 m/s, it collides with Tanya's car, which is moving 3 m/s backward. Bill's car bounces backward at a speed of 1.2 m/s. Bill's car has a mass of 1100 kg and Tanya's car has a mass of 800 kg. a. What is the velocity of Tanya's car after the collision? b. Assuming all lost kinetic energy is converted to heat, how much energy is converted to heat during the collision?

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