A body of mass m is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass m is slightly pulled down and released, it oscillates with a time period of 3 s. When the mass m is increased by 1 kg, the time period of oscillations becomes 5 s. The value of m in kg is
- 34
- 43
- 169
- 916
Answer
(4) 916
Solution
T = 2 mk T m
35 = mm + 1
925 = mm + 1
9m + 9 = 25m
m = 916 kg
Answer: (4)