Hey. Just studying and came across a question I'm not too confident about...
A trolley of mass 0.20kg travelling at 1.5 m/s to the right collides with a trolley of mass 0.30kg moving in the opposite direction at 0.5 m/s.
A) Calculate the total momentum before the collision.
B) Calculate the velocity of the trolleys after the impact if they move off together.
I know the answers but need an explanation on how to work this out properly.
Also any one willing to tutor me/ answer and explain a bunch of questions, I would be eternally grateful to.