On a frictionless horizontal air track a 0.300 kg glider moving 9.00m/s to the right collides with a 0.800 kg moving 1.50m/s to the left. (a) If the two gliders stick together, what is the velocity of the sticking gliders after collision
conserve momentum
0.3(9) + 0.8(-1.5) = (0.3+0.8)v