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Chemistry 8 Online
OpenStudy (anonymous):

According to Newton's second law of motion, if we have a rigid, unchanging mass and we observe it accelerating, what must be happening? A. a force is being applied to the mass B. a force was once applied but is now not being applied C. no force was or is being applied to the mass D. the mass MUST be changing

OpenStudy (anonymous):

i think its either A or B

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