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A spring is attached with a block of massmand a fixed horizontal rod. The block is lying on a smooth horizontal table an

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Work Power And Energy of Class 11

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A spring is attached with a block of mass m and a fixed horizontal rod. The block is lying on a smooth horizontal table and initially the spring is vertical and unstretched. Natural length of spring is 3l0. A constant horizontal force F is applied on the block so that block moves in the direction of force. When length of the spring becomes 5l0 block leaves contact with the table. Find the constant force F (in N), if initial and final velocity of block is zero. (Take m = 12 kg and g = 10 m/s2) 3

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