Question

please tell me the answer with full explanation​

Answer 1

Answer:

10 per second or hertz (Hz)

Answer 2

Answer:

Answer is 0.1 sec & 10 Hz

Explanation:

Time taken by the pendulum to complete 40 oscillation = 4 sec.

Time taken by the pendulum to complete 1 oscillation =

$\frac{4}{40} \\ = \frac{1}{10 } \\ = 0.1 \: sec$

Time period of pendulum = 0.1 sec

Frequency of pendulum = oscillation / time

$= \frac{40}{4} \\ = 10hz$

So frequency of pendulum is 10 Hz