Simple Harmonic Motion 3 Question 9
9. A uniform cylinder of length and mass having cross-sectional area is suspended, with its length vertical, from a fixed point by a massless spring, such that it is half-submerged in a liquid of density at equilibrium position. When the cylinder is given a small downward push and released it starts oscillating vertically with a small amplitude. If the force constant of the spring is , the frequency of oscillation of the cylinder is
(a)
(b)
(c)
(d)
Analytical & Descriptive Questions
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Answer:
Correct Answer: 9. (b)
Solution:
- When cylinder is displaced by an amount
from its mean position, spring force and upthrust both will increase. Hence,
Net restoring force
or
or
Now,