1.0-kilogram laboratory cart moving with a velocity of 2.50 meter per second due east collides with and sticks to a similar cart initially at rest. After the collision, the two carts move off together with a velocity of 0.25 meter per second due east. The total momentum of this frictionless system is on Select one: a. zero before the collision b. zero after the collision c. the same before and after the collision d. greater before the collision than after the collision

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