physics help 8?

Question

Two air track carts move along an air track towards each other. Cart A has a mass of 450 g and moves toward the right with a speed of 0.850 m/s and air track cart B has a mass of 300 g and moves toward the left with a speed of 1.12 m/s. What is the total momentum of the system?
a. 0.047 kg x m/s toward the right.
b. 0.719 kg x m/s toward the right.
c. 0.750 kg x m/s toward the right.
d. 0.750 kg m/s toward the left.

Answer 1

a. The momentum is mass x velocity. The objects are moving in opoosite directions. Since the one moving to the right has higher momentum, the direction of the whole system is to the right. The value is the difference of the two bodies.