Car 1 of mass 900 kg traveling east at 15 m/s collides head on with car 2 traveling west at 20 m/s, see Figure. After collision, car 1 starts moving west at 10 m/s whereas car 2 starts moving east at 10 m/s as shown in Figure. a) What is the mass of car 2? b) What amount of heat was released in this collision? is 10! VWis 1 2 2 before after