Assertion (A) Soldiers are asked to break steps while crossing the bridge. Reason (R) The frequency of maching may be equal to the natural frequency of bridge and may lead to resonance which can break the bridge.

Question

Assertion (A) Soldiers are asked to break steps while crossing the bridge. Reason (R) The frequency of maching may be equal to the natural frequency of bridge and may lead to resonance which can break the bridge. (A) Both assertion and reason are true and reason is the correct explanation of assertion (B) Both assertion and reason are true but reason is not the correct explanation of assertion (C) Assertion is true but reason is false (D) Both assertion and reason are false

Tardigrade Admin · Accepted Answer

If the soldiers while crossing a suspended bridge march in steps, the frequency of marching steps of soldiers may match with the natural frequency of oscillations of the suspended bridge. In that situation, resonance will take place, the amplitude of oscillation of the suspended bridge will increase enormously, which may cause the collapsing of the bridge. To avoid such situations, the soldiers are advised to break steps on suspended bridge.

Q. Assertion (A) Soldiers are asked to break steps while crossing the bridge. Reason (R) The frequency of maching may be equal to the natural frequency of bridge and may lead to resonance which can break the bridge.

Both assertion and reason are true and reason is the correct explanation of assertion

Both assertion and reason are true but reason is not the correct explanation of assertion

Assertion is true but reason is false

Both assertion and reason are false

Q. Assertion (A) Soldiers are asked to break steps while crossing the bridge.
Reason (R) The frequency of maching may be equal to the natural frequency of bridge and may lead to resonance which can break the bridge.