Airplane flight recorders must be able to survive catastrophiccrashes. Therefore

Question

Airplane flight recorders must be able to survive catastrophiccrashes. Therefore, they are typically encased in crash-resistantsteel or titanium boxes that are subjected to rigorous testing. Oneof the tests is an impact shock test, in which the box must survivebeing thrown at high speeds against a barrier. A 41 kg box isthrown at a speed of 255 m/s and isbrought to a halt in a collision that lasts for a time of6.6 ms. What is the magnitude of theaverage net force that acts on the box during colision?

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Explanation / Answer

impulse =F*t = P (change in momentum) P1 = 41kg*255m/s, P2 = 0 F = P/t = 41kg*255m/s / 6.6*10-3 s =1.58*106 N the froce is about 1.58*106N

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