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In the figure below, a 2.9 kg block is accelerated from rest by a compressed spring of spring constant 644
N/m. The block leaves the spring at the spring's relaxed length and then travels over a horizontal floor with
a coefficient of kinetic friction uk = 0.25. The frictional force stops the block in distance 8.1 m. What was
the original compression distance of the spring?

No friction
D-
MilS

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