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A 3.0 kilogram block slides with a speed of 1.1 m/s on a frictionless, horizontal surface until it encounters a spring.
(a) If the block compresses the spring 7.0 centimeter before coming to rest, find what is the force constant of the spring?
(b) Compute what initial speed should the block have if it is to compress the spring by 1.3 centimeter?
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