1. A 5-lb. mass (g = gc) falls 25 ft. until it strikes a spring. If the spring modulus k is 25 lbf /ft of deflection, how far will the spring be deflected? Assume that all the energy of the falling body just goes to compress the spring.
2. A 10-kg mass falls 3 m until it strikes a spring. If the spring modulus k is 1000 N/m, how far will the spring be deflected if all the energy of the falling body goes into compressing the spring?
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