1. The problem statement, all variables and given/known data Marble A, mass 5g moves at a speed of 20 cm/s. It collides with a second marble B, mass 10 g, moving at 10 cm/s in the same direction. After the collision, marble A continues with a speed of 8 cm/s in the same direction. A) Calculate the momentum of each marble before the collision. B) Calculate the momentum of each marble after the collision. C) What is the speed of marble B after the collision? 2. Relevant equations F=m(Vf-Vi)/t 3. The attempt at a solution I converted all the numbers first Mass A= .005kg Vi A = .2 m/s Mass B= .1 m/s Vi B = .2 m/s V after = .8 m/s A) Marble A: (.005kg)(02m/s) = .001 kg*m/s Marble B: (.01kg)(.1m/s)=.001 kg*m/s B) (.001+.001)=(.005kg+.01kg)V v=1.33 m/s What did I do wrong in B? I'm pretty sure A is right.