Force vibrations and resonance .

Distinguish between forced vibrations and resonance.

Distinguish between forced vibrations and resonance. Draw neat, labelled diagrams for the modes of vibration of a streched string in second harmonic and third harmonic. The area of the upper face of a rectangular block is 0.5mxx0.5m and the lower face is fixed. The height of the block is 1cm . A shearing force applied at the top face produces a displacement of 0.015 mm . Find the strain and shearing force. (Modulus of rigidity : eta=4.5xx10^(10)N//m^(2) )

What are forced vibrations and resonance ? Show that only odd harmonics are present in an air column vibrating in a pipe closed at one end. A stretched wire emits a fundamental note of frequency 256 Hz. Keeping the stretching force constant and reducing length of the wire by 10cm, the frequency becomes 320 Hz. Calculate the original length of wire.

Write two differences between forced vibration and resonance.

What is forced vibration and resonance ? Distinguish.

Write differences between forced.vibration and resonance.

Distinguish between free vibration and resonance.