• # question_answer A mass m attached to a light spring oscillates with a period of 2 sec. If the mass is increased by 2 kg, the period increases by 1 sec. The value ofwis: A) 1kg                  B) 1.6 kgC) 2 kg                             D) 2.4 kg

${{T}_{1}}=2\pi \sqrt{\frac{m}{k}}=2$ ${{T}_{2}}=2\pi \sqrt{\frac{m+2}{k}}=3$ $\frac{2}{3}=\sqrt{\frac{m}{m+2}}$ $m\text{ }=\text{ }1.6\text{ }kg$