Momentum.....Please urgent help!!! My Question: A 1500 kg car moving east at 38 m/s collides with a 1780 kg car moving south at 15 m/s and the two cars stick together. (a) What is the velocity of the cars right after the collision? _______m/s ______o (b) How much kinetic energy was converted to another form during the collision? ______kJ My attempt: So i used the momentum formula and got the total momentum before collision and made it equal to the momentum after the collsion but didn't get the right answer. Before collision: car1: p=m1v1=(1500kg)(38m/s)=57000 car2: p=m2v2=(1780kg)(-15m/s)=-26700 p1+p2=P total 57000+(-26700)=30300 After collision: car1: p=1500v1 car2: p=1780v2 v1=v2 because of collision therefore 30300=(1500+1780)v v=9.24m/s when i took out the negative i got a different answer (25.5m/s) which was also wrong. Part B i've no idea how to do:uhh: Please tell me what i'm doing wrong!!!!!