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## Homework Statement

This is not any school or any homework problem, It's just a problem I read in a book. And I dont know anything about it. So I would just like anyone to give me a brief guideline to solve this sum and please help me. (PS: dont tell me the answer, I wanna try it on my own. Though I do need a lot of guidelines.....)

I'm a real amateur, so you guys might find this sum easy, but i don't get it.

here it is:

A simple pendulum of length 40cm oscillates with an angular amplitude of 0.04 rad. Find the time period.

## Homework Equations

[tex]T = 2 \pi \sqrt {L/g}[/tex]

(that's all I know.... I dont know about rad)

## The Attempt at a Solution

Well I did think about it and came to a conclusion that since the time period doesnt depend on the amplitude of the pendulum well the time period will be:

[tex]T = 2 \pi \sqrt {L/g}[/tex]

[tex]T = 2 * 3.14 \sqrt {0.4m/9.8}[/tex]

[tex]therefore T = approx. 1.26s[/tex]

Though I dunno what the answer is...