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A 1kg block is dropped from a height of 0.4m on a spring of force constant 980 $N m^{- 1}$ . The maximum compression of the spring is

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Correct option is A

mg(h+x)=12kx2 1×9.8(0.4+x)=12×980×x2 250x2-5x-2=0 ⇒x=10cm

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A 1kg block is dropped from a height of 0.4m on a spring of force constant 980Nm−1 . The maximum compression of the spring is

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A 1kg block is dropped from a height of 0.4m on a spring of force constant 980 $N m^{- 1}$ . The maximum compression of the spring is