Question

A 1.0-kilogram laboratory cart moving with a velocity of 0.50 meter per second due east collides…

A 1.0-kilogram laboratory cart moving with a velocity of 0.50 meter per second due east collides with and sticks to a similar cart initially at rest. After thecollision, the two carts move off together with a velocity of 0.25 meter per second due east. What is the total momentum of this frictionless system?
zero before the collision
the same before and after the collision
greater before the collision than after the collision
zero after the collision

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