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.

As you drive in to school, you hear a random radio-show caller arguing that sun exposure really has not been shown to cause skin cancer and that some research suggests that skin cancer is completely genetic and not related to sun exposure at all. at the time, you think that this is a silly argument and that the caller does not know what she is talking about. however, two months later, you are outside without wearing sunscreen, and you find yourself remembering that you had read something about how the sun actually does not cause skin cancer. this process is evidence that has influenced your attitude