4.7 Resonance

Natural frequency is best described as

• the frequency at which an object naturally vibrates at when it is disturbed

• a vibration that can be heard in the wild

• the radio frequency that astronauts naturally use when travelling into space

• the material used to make a swing

True or false? Every object has a natural frequency.

• True

• False

Resonance occurs when

• energy is transferred between 2 objects vibrating at different frequencies

• energy is transferred between 2 objects vibrating at the same natural frequency

• energy is transferred between 2 objects via heat

• energy is transferred between 2 objects via gravity

A sympathetic vibration occurs when

• an object reacts to a certain level of heat

• an object reacts to a vibration with its natural frequency

• an object reacts to a loud sound

• an object reacts to a quiet sound

How can resonance break an object?

• forcing an object to vibrate at its natural frequency for a short time

• forcing an object to vibrate at different frequencies for a short time

• forcing an object to vibrate at different frequencies for a longtime

• forcing an object to vibrate at its natural frequency for a long time

If you are a supervillain, which of the following statements is true?

• We want bridges to resonate at their natural frequency to remain functional.

• We want bridges to resonate at their natural frequency to collapse.

• We do not want bridges to resonate at their natural frequency to remain functional.

• We do not want bridges to resonate at their natural frequency to collapse.