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Discussion

GATE preparation for Mechanical Engineering
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Blocks A and B of masses 40 kg and 60 kg, respectively are placed on a smooth surface as shown in the figure and the spring connected between them is stretched a distance 2 m . If they are released from rest, the speeds of both blocks the instant the spring becomes unstreched is (Take k = 150 N/m)

 
VA = 4 m/sec, VB = 3 m/sec
VA = 2 m/sec, VB = − 6 m/sec
VA = 2 m/sec, VB = − 3 m/sec
VA = − 3 m/sec, VB = 2 m/sec

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Edugate405

Correct answer is D)