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6. (Potential Energy and Conservation of Energy) What should be the spring constant k of a spring designed to bring a 1200-kg car to

6. (Potential Energy and Conservation of Energy) What should be the spring constant k of a spring designed to bring a 1200-kg car to rest from a speed of 95 km/h so that the occupants undergo a maximum acceleration of 4.0 g? Answer: k = 2648 N/m

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