A person pushes two boxes with a horizontal 100 N force on a frictionless floor.

Question

A person pushes two boxes with a horizontal 100 N force on a frictionless floor. Box A is heavier than box B. Which of the following statements is true? (Why is that right?)

(A) Box A pushes on box B with a force of 100 N, and box B pushes on box A with a force of 100 N.

(B) Box A pushes on box B harder than box B pushes on box A.

(C) Boxes A and B push on each other with equal forces of less than 100 N.

(D) The boxes will not begin to move unless the total weight of the two boxes is less than 100 N.

Explanation / Answer

(c) is right since no relative movement between boxes net force must be 0

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