Geoff counts the number of oscillations of a simple pendulum at a location where the acceleration due to gravity is 9.80 m/s2, and finds that it takes 25.0 s for 15 complete cycles. 1) calculate the length of the pendulum. (express your answer to three significant figures.

Given the number of oscillations and the given acceleration due to gravity, the length of the pendulum is 0.692m.

Given the data in the question;

Time period;

Using the simple pendulum equation of time:

Where T is the period of time, L is the length of the pendulum and g is the acceleration due to gravity( )

We make "" the subject of the formula

We substitute our given values into the equation

Therefore, given the number of oscillations and the given acceleration due to gravity, the length of the pendulum is 0.692m.

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