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Determination of average net force acting on the box using Newton's second law of motion.

Airplane flight recorders must be able to survive catastrophic crashes. Therefore, they are typically encased in crash-resistant steel or titanium boxes that are subjected to rigorous testing. One of the tests is an impact shock test, in which box should survive being throw at a high speeds against a barrier. A 41 kg box is thrown at the speed of 220 m/s and is brought to a halt in a collision that lasts for a time of 6.50 m/s. What is the magnitude of an average net force that acts on the box throughout the collision?

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