Determine the natural frequency of vibration of the `100N` disk. Assume the disk does not slip on the inclined surface.

The frequency of natural vibrations of a body is determined by

The frequency of a source of sound is 100 Hz. How money times does it vibrate in a minute?

The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute ?

Figure shows a uniform disk, with mass M = 2.5 kg and radius R = 20 cm, mounted on a fixed horizontal axle. A block with mass m = 1.2 kg hangs from a massless cord that is wrapped around the rim of the disk. Find the acceleration of the falling block, the angular acceleration of the disk, and the tension in the cord. The cord does not slip, and there is no friction at the axle.