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When the pendulum oscillates the amplitude of the first

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Reference no: EM13627915

The disc of a torsional pendulum has a moment of inertia of 0.05kgm^2 and is immersed in a viscous fluid. The shaft to which the disc is attatched has a 1cm diameter, is 30cm long and has a shear modulus of 40GN/(m^2). When the pendulum oscillates the amplitude of the first cycle is 6 gradians and the amplitude of the fourth cycle is 0.75 gradians. Calculate the following:

1- Logarithmic decrement

2- Damping coefficient

3- Damped natural frequency.

Reference no: EM13627915

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