Question

write short note on simple pendulum

Answer 1

A simple pendulum consists of a mass called a bob which is attached to a fixed string.The terms associated with it are
amplitude - maximum displacement from mean position
time period - time taken to complete one oscillation
frequency - number of vibrations or cycles per unit of time.

Answer 2

A simple pendulum consists of a small metallic ball called ‘bob’ suspended from a rigid support by  an inextensible thread of negligible mass. When the bob of the pendulum is released after taking it  slightly to one side, it begins to move to and fro. The to and fro motion of a simple pendulum is an  example of a periodic and oscillatory motion.  The pendulum is said to have completed one oscillation when its bob, starting from its means  position O, moves to A, then to B and back to O. The pendulum also completes one oscillation  when its bob moves from one extreme position A to the other extreme position B and comes back  to A.

The time taken by the pendulum to complete one oscillation is called its Time period.

$Time$ $period$ $=$$\frac{Total time taken}{No of oscillations}$

The time period depends upon the length of the thread. Longer the thread, longer is the time  period. Time period of a pendulum is independent of the mass of the bob or to the extent to which the  bob is displaced.