Q62. A block of mass m is attached to two unstretched springs of spring constants k, each as shown. The block is displaced towards right through a distance x and is released. The speed of the block as it passes through the mean position will be?
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Option (b)
Block is displaced by 'x' distance from its equilibrium position. So, it'll perform SHM with this amplitude. It can't exceed this, because only this much amount of energy is provided to it.
Also, the springs are in parallel combination and can be replaced by a spring of spring constant '2k'.
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