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Boxes A and B are in contact on a horizontal, frictionless surface. Box A has mass 20.0 kg and box B has mass 5.0 kg. A horizontal force of 250 N is exerted on box A. What is the magnitude of the force that box A exerts on box B?
Answer: Fa = 50 N
Explanation
F = 250 N is the force that causes acceleration for the entire system.
By applying Newton’s second law for the whole system, we can obtain the acceleration for the entire system.
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