In a factory, a robot arm exerts a force on packed boxes to move them along a track to a waiting truck. The boxes are stationary until the arm pushes them. There are two kinds of packed boxes, box A and box B. Box B has more mass than box A. Which sentence is true about the boxes?
The acceleration of box B is less because it has more mass.
The acceleration of box B is more because it has more mass.
The acceleration of box A and box B is the same because mass has no effect.
The acceleration of box B is in the negative direction because it has more mass.

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