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     EduGorilla 
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    A spring mass system of spring constant 5 N/m, having upper and lower masses 10 Kg and 15 Kg respectively, is held at rest at height H. Find the minimum value of H so that the system has a tendency to rebound after hitting the ground. The coefficient of the restitution between lower mass and ground is zero. 

    Options :-

    1. 32.1 m

    2. 40.2 m

    3. 52.5 m 

    4. None of these

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