The moment of inertia of the disc used in a torsional pendulum about the suspension wire is 0.2kg-m^2 . It oscillates with a period of 2s. Asnother disc is placed over the first one and time period of the system becomes 2.5s. Find the moment of inertia of the second disc about the wire.

Two point-like objects of masses 20 gm and 30 gm are fixed at the two ends of a rigid massless rod of length 10 cm . This system is suspended vertically from a rigid ceiling using a thin wire attached to its center of mass, as shown in the figure. The resulting torsional pendulum undergoes small oscillations. The torsional constant of the wire is 1.2 times 10^−8 N m rad^(−1) . The angular frequency of the oscillations in n times10^(−3)rad s^(−1) . The value of n is _____.

An engineer has odd-shaped 10 kg object needs to find its rotational inertia about an axis through its center of mass. The object is supported on a wire stretched along the desired axis. The wire has a torsion constant k = 0.50 N.m . If this torsion pendulum oscillates through 20 cycles in 50 s, what is the rotational inertia ("in" 10^(-2) kg m^(2)) of the object?

Compound Pendulum

Pendulums||Simple pendulums||Physical pendulum||Angular and Linear SHM

The torsion modulus of a spiral spring is 2 N·m/rad. The spring is turned 10 times. What is the work done?

If T and T' are the periods of a simple pendulum and a conical pendulum of the sample length then .