Maximum speed for pendulum problem

[soulja101]

Homework Statement

A pendulum of length 1.0cm is raised 15cm. What is the maxium speed it can reach the bottom.

Homework Equations

I have no clue. All i know is that v1 is zero.

The Attempt at a Solution

i need help to get started

 

[Integral]

I am having trouble understanding the situation. How do you raise a 1cm pendulum 15cm? Please check your post for typos.. could it be a 1m pendulum?

 

[soulja101]

pendulum

the pendulum length is 1.0m
my bad

 

[DieCommie]

Maybe conservation of energy? Kinetic and potential?

 

[Ja4Coltrane]

energy is correct. good.
So because of the way they wrote the queston, it's very easy.
:)

 

[Kurdt]

At equilibrium (i.e. the bottom in this question), all the potential energy has been converted to kinetic energy.

 

[soulja101]

do i use the Ek=mv2

 

[Kurdt]

That is not the kinetic energy equation. $$E = \frac{1}{2} mv^2$$