30 according to newton's second law of motion, if a rigid body of unchanging mass is observed accelerating, what must be happening?
a. a force is being applied to the mass
b. the mass must be changing
c. no force was or is being applied to the mass
d. a force was once applied but is now not being applied.
Answers: 3
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30 according to newton's second law of motion, if a rigid body of unchanging mass is observed accel...
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