Advertisements
Advertisements
प्रश्न
Explain why are soldiers asked to walk out of step while crossing bridges?
Advertisements
उत्तर
When the soldiers walk in step, they produce some fixed frequency. If this frequency corresponds to the natural frequency of the bridge, the resonance can take place. This, in turn, will make the bridge to vibrate violently, and hence make it collapse. To avoid such a situation, the soldiers are asked not to march in step.
संबंधित प्रश्न
Distinguish between the free (or natural) and forced vibrations.
Differentiate between the forced and resonant vibrations.
When a troop crosses a suspension bridge, the soldiers are asked to break steps. Explain the reason.
When a body vibrates under a periodic force, the vibrations of the body are ______.
Differentiate between the following:
Radio waves and light waves.
What do you mean by resonance? When does resonance occur?
The rearview mirror of a motorbike starts vibrating violently at some particular speed of the motorbike. What is the name of the phenomenon taking place? Why does the happen?
When a tuning fork, struck by a rubber pad, is held over a length of the air column in a tube, it produces a loud sound for a fixed length of the air column. Name the above phenomenon. How does the frequency of the loud sound compare with that of the tuning fork? State the unit for measuring loudness.
Describe a simple experiment to illustrate the phenomenon of resonance and explain it.
