Respuesta :

Answer: 0.22hz

Step-by-step explanation:

Hi to answer this question we have to analyze the information given:

  • Period (T) = 4.5 Seconds

So, to calculate the frequency of the pendulum we have to apply the formula;

Frequency (f)= 1 / period  

Replacing with the value given:

f = 1/ 4.5 sec = 0.22 hz

Feel free to ask for more if needed or if you did not understand something.