What is Newton's First law of motion?
A. Every mass exerts a force on any other mass that is proportional to the product of the masses divided by the square of the distance between them.
B. A body continues in a state of rest or uniform motion in a straight line unless made to change that state by forces acting on it.
C. When two bodies interact, they create equal and opposite forces on each other.
D. Force equals mass times acceleration, F=ma.
Answer: B
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