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## Homework Statement

A simple pendulum with mass m = 1.7 kg and length L = 2.42 m hangs from the ceiling. It is pulled back to an small angle of θ = 8.6° from the vertical and released at t = 0.

Qn: What is the maximum speed of the pendulum?

## Homework Equations

θ=θmax*cos(ωt+∅)

## The Attempt at a Solution

i derivative the equation i got θ=θmax*ω*sin(ωt)

the ω outside i know is angular velocity √(g/L) but inside ω is √(k/m)

where do i find k constant in this question?