PHYSICS HELP PLEASE ONE QUESTION 10 POINTS:)

OK three cases are given three students separately false or push one two three boxes on a smooth surface for that is all the horizontal as shown in the figure so we have to take the acceleration acceleration the same as you wander off Sara other of said marsalis all the ok this is a physical and y axis is given

their crystal patterns have been disrupted by stress

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.