Pranav was climbing the stairs to meet his friend. On his way he saw a person was hypnotizing a lady with a pendulum moving to and fro. The lady was giving all her gold jewels to him. Pranav immediately called the police and then went towards them and threw his pendulum. The police caught the person and the lady came out of the hypnotizing and thanked Pranav. a) Give the values of Pranav. b) What is the moral of the incident? c) What is the length of the simple pendulum which ticks seconds? d) What type of motion does the pendulum show?
a) Pranav is very shrewd and has good presence of mind. b) We should not allow strangers inside our house. c) The pendulum which ticks seconds is a second pendulum and its time period is T = 2s If l is the length of the pendulum, then 2 l T g = π Substituting the values, we get l = 0.99m. d) Oscillatory motion.
