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A 1.2 kilogram object is suspended from a vertical spring whose spring constant is 125 N/m.
(a) Determine the amount by which the spring is stretched from its unstrained length.
(b) The object is pulled straight down by an additional distance of 0.14 meter and released from rest. Find the speed with which the object passes through its original position on the way up.
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A 1540.0 g mass is ona horizontal surface with μk = 0.31, and isin contact with a massless spring with a force constant of 787.0N/m which is compressed. When the spring is released, it does 2.52J of work on the mass while returning to its equilibr..
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