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Q.

ln the figure shown a block of mass m is attached at ends of two springs. The other ends of the spring are fixed. The mass m is released in the vertical plane when the springs are relaxed. The velocity of the block is maximum when

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a

k1 is compressed and k2 is elongated

b

k1 is elongated and k2 is compressed

c

k1 and k2 both are compressed

d

k1 and k2 both are elongated.

answer is B.

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Detailed Solution

Speed of block is maximum at mean position. At mean position upper spring is extended and lower spring is compressed.
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