TS EAMCET Medical 10 May 2023 Shift 2 Paper

A block of mass ' m ' is attached to the lower end of a spring whose upper end is fixed to a rigid support. The spring has negligible mass. When the block is slightly pulled down and released, it oscillates with a time period of 3 seconds. When the mass of the block is increased by 1‌kg, the time period of oscillation becomes 5 seconds, then the value of ' m ' in kg is