4) When a mass of 1 kg is suspended from a vertical spring. Its length increases by 0.98 m. If this mass is pulled downwards and then released, what will be periodic time of vibration of spring? (g = 9.8 m/s2 )
5) A block of mass 'm' moving with velocity (v) collides perfectly inelastically with another identical block attached to spring of force constant K. What will be the amplitude of resulting SHM?
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