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Physics 21 Online
OpenStudy (anonymous):

The blocks shown are released from rest with spring unstretched. Pulley & horizontal surface are frictionless. If k=400 N/m and M=4.5 kg, what is maximum extension of spring? http://s3.amazonaws.com/answer-board-image/20071222120396333222723984175004973.jpg

OpenStudy (anonymous):

did do not understand

OpenStudy (fifciol):

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