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Physics 7 Online
OpenStudy (anonymous):

if we we have a rigid, unchanging mass and we observe it accelerating, what must be happening?

OpenStudy (anonymous):

A. the mass MUST be changing B. no force was or is being applied to the mass C. a force was once applied but is now not being applied D. a force is being applied to the mass

OpenStudy (cail):

I believe it is either D or C

OpenStudy (cail):

Did that help atleast?

OpenStudy (anonymous):

F = m a holds the answer

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