Published by:
CGP EDU Academic Team
Published on: August 11, 2026
A body of mass 
is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass 
is lightly pulled down and released, it oscillates with a time period of 3 s. When the mass 
is increased by 1 kg, the time period of oscillations becomes 5 s. The value of 
in kg is;
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Time period,
Case I, 
… ..(i)
Case II, When the mass 
is increased by 1 kg, then
………… (ii)
From Eqs. (ii) and (i) we get
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