1. The work done in stretching a spring-mass system a distance x from its rest position is U = kx²/2. In terms of U, how much work is done if the system is stretched a distance of 2x?
1. The work done in stretching a spring-mass system a distance x from its rest position is U = kx²/2. In terms of U, how much work is done if the system is stretched a distance of 2x?
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