G192032 Pages:4

A person standing on a spring produces a deflection of 1.0 mm to the spring. Find
9 the natural frequency and Time period.
d) A vibrating system consists of mass of 10 kg, spring of stiffness 240 N/m and a
damper with a damper coefficient of 10 N-s/m. Determine
i) Damping factor
ii) Natural frequency of damped vibration 10
iii) Logarithmic decrement

iv) Ratio of successive amplitudes

v) Number of cycles after which initial amplitude reduced to 25%

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