Fundamentals of Physics Extended 12th Edition · Kinetic Energy and Work · Problem 75
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Halliday, Resnick & Walker — Kinetic Energy and Work: Problem 75
Car crash force from seat belt. A car crashes head on into a wall and stops, with the front collapsing by 0.500 m. The 70 kg driver is firmly held to the seat by a seat belt and thus moves forward by 0.500 m during the crash. Assume that the force on the driver from the seat belt is constant during the crash. Use the work-kinetic energy theorem to find the magnitude of that force during the crash if the initial speed of the car is (a) 35 mi/h and (b) 70 mi/h? (c) If the initial speed is multiplied by 2, as here, by what multiplying factor is the force increased?
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주어진 조건: . A, 0.500 m, 70 kg
구하는 것: (a) 35 mi/h and; (b) 70 mi/h?; (c) If the initial speed is multiplied by 2
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Fundamentals of Physics Extended · 12th Edition
저자: Halliday, Resnick & Walker
출판사: Wiley
단원: Kinetic Energy and Work