The period of the pendulum doesn't determine the length of the string.
It's the other way around.
The period of the pendulum is proportional to the square root of its length.
So if you want to triple the period, you have to make the string nine times
as long as it is now.
Answer: 60
Explanation: if u hit it it will have impact and the impact added 10n
Look it up on google it has the answer
