Hey, I need help to study for finals: I know one of the questions (our teacher gave us) is: there is a 4kg mass traveling at 4 m/s to the right on a frictionless surface that collides with a block of 5kg. The 5kg block is moving at 2 m/s. They stick to each other after the collision. What is the velocity after the collision? Can you help me?

Question

Thanks!

Answer 1

which direction is the 5kg block moving?

system momentum is conserved

Answer 2

@R_scott left