From the calculation, the gravitational field at the pendulum’s location is 9.8 m/s^2
What is a pendulum?
A pendulum is a device that is used to demonstrate oscillatory motion. We have the following information.
l = 36.9 cm or 0.369 m
T = 1.22 s
Then;
T = 2π√l/g
T/2π = √l/g
(T/2π)^2 = l/g
g(T/2π)^2 = l
g = l/(T/2π)^2
g = 0.369/(1.22/2 *3.14)^2
g = 9.8 m/s^2
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