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[" 30.A "2kg" block slides on a horizont...

[" 30.A "2kg" block slides on a horizontal floor with a speed of "],[4m/s" .It strikes a uncompressed spring,and compresses "],[" it till the block is motionless.The kinetic friction force "],[" is "15N" and spring constant is "10,000N/m" .The spring "],[" compresses by "],[[" (a) "8.5cm" (b) "5.5cm" (c) "2.5cm" (d) "11.0cm]]

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