# integrals: pendulum problem

#### Niemand

##### New member
Hey, could someone help me with this?
The function describes the pendulum's bob's velocity.

#### topsquark

##### Full Member
Well, in your title it appears that you know you have to take an integral...
$$\displaystyle s(t) = \int 1,2 ~ cos( 2 \pi t ) ~ dt$$

The thing you need to check is how often the pendulum changes direction. One way to take care of that is to use
$$\displaystyle d(t) = \int \left | 1,2 ~ cos( 2 \pi t) \right | ~dt$$

Without seeing what you have done that's the best I can do to get you started.

-Dan

#### Niemand

##### New member
Hey, could someone help me with this? The function describes the pendulum's bob's velocity.

Staff member

#### HallsofIvy

##### Elite Member
You posted a question, got a very good answer by topsquark, then just posted the same question again! Please do as Subhotosh Kahn said- post what you do understand about this problem and show what you can do on it. Do you know what the "absolute value" is? Do you know how to integrate such a function?