Civil Engineering ⇒ Topic : Simple pendulum and its Laws

When a heavy bob suspended by a weightless inextensible but flexible string from a rigid support so that it may oscillate without any friction is called a simple pendulum.

Laws of Simple Pendulum:-

1. Law of isochronism - For a fixed length of the pendulum and at a certain place each oscillation takes equal time if the amplitude is small (less than 4°).
2. Law of length - At a certain place the time period of pendulum is proportional to the square root of its effective length.
3. Law of acceleration due to gravity - For a certain length of the pendulum its time period is inversely proportional to the square root of acceleration clue to gravity at that place.
4. Law of mass - The time period of a pendulum of fixed length and at a certain place does not depend upon the mass or material of the bob.