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As shown in fig. a block of mass m = 0.4...

As shown in fig. a block of mass m = `0.40` kg is moving on a frictionless surface at a speed of v = `0.50 m//s ` .A block of force constant k = 750 N /m comprised the spring and becomes rest for a instant . How much spring will be compressed ?

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`1.2 xx10^(-2) m or 1.2 cm`
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