A small boy places a rock under the middle of a of a long wood plank,sits near one end and his mother sits near the opposite end.To balance each other
A) the mother should move further away from the boy.
B) the boy should move closer to his mother.
C) both should move closer to the ends of the plank.
D) both should move closer to the middle of the plank.
E) None of the above choices would work.
Correct Answer:
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