Question

Which of the following is an example of mechanical resonance?

• A. A child on a swing.
• B. A pendulum.
• C. A tuning fork.
• D. Nuclear magnetic resonance

Answer 1

Answer: (A), (B)

The correct options are
A A child on a swing.
B A pendulum.

$Answer:-$ A,B

Mechanical resonance is the tendency of a mechanical system to respond at greater amplitude when the frequency of its oscillations matches the system's natural frequency of vibration (its resonance frequency or resonant frequency) than it does at other frequencies. It may cause violent swaying motions and even catastrophic failure in improperly constructed structures including bridges, buildings and airplanes—a phenomenon known as resonance disaster.

Various examples of mechanical resonance include:-

• Most clocls keep time by mechanical resonance in a balance wheel, pendulum, or quartz crystal.
• The resonance of the basilar membranein the ear.
• Making a child's swing swing higher by pushing it at each swing.
• A wineglass breaking when someone sings a loud note at exactly the right pitch.