1.2.1. Vibration

Try these first

1. 1.

   Define vibration in a single sentence.

   Hint

   Think about how objects move back and forth.

2. 2.

   What is free vibration?

   Hint

   Consider what happens after you pluck a string.

3. 3.

   What type of vibration occurs after an initial disturbance without external forces?

   • Free Vibration
   • Forced Vibration
   • Resonance

   Hint

   Think about the motion of a pendulum.

4. 4.

   True or False: Forced vibrations occur only when an external force is present.

   • True
   • False

   Hint

   Consider what happens to a structure when an external force acts on it.

5. 5.

   A bridge is designed to withstand vibrations from traffic (forced) and natural wind conditions (free). What elements should be considered in the design?

   Hint

   Think about materials and their properties.

6. 6.

   Evaluating a tall building, engineers find its natural frequency aligns closely with vibrations expected during an earthquake. What measures could be taken to mitigate potential damage?

   Hint

   Consider ways to alter the building's dynamics.