This is a 2 part question. A 4000kg truck has a head on inelastic collision with a 2500kg truck. the 4000kg truck moving at 20m/s and the 2500kg is going at 35 m/s. :
A. calculate the total momentum of the trucks before they collide.
B calculate thier speed just after they collide.

“when two plates carrying continents collide, the continental crust buckles and rocks pile up, creating towering mountain ranges. when an ocean plate collides with another ocean plate or with a plate carrying continents, one plate will bend and slide under the other. this process is called subduction. “ i found this on google i hope it