Question

What are the two properties of simple pendulum on which the time period of the simple pendulum does not depend?

Answer 1

Answer:

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The period for a simple pendulum does not depend on the mass or the initial anglular displacement, but depends only on the length L of the string and the value of the gravitational field strength g, according to The mpeg movie at left (39.5 kB) shows two pendula, with different lengths.

Answer 2

As it is used in clocks period of pendulum oscillations depend only on its length and strength of local gravity. So when you don't move your clocks it depend s only on length of pendulum.