B Young's Modulus and Stiffness

1. Jun 6, 2017

zeldaspurpose

Just want clarification on two equations.

So basically, I want to calculate the time period T of the complete oscillation of a cantilever. I use this equation.

Is E equal to young's modulus or is it equal to stiffness? If it is equal to stiffness, can I use this equation to calculate the stiffness?
k =

2. Jun 6, 2017

Staff: Mentor

What is your definition of the parameter that you call "stiffness?"

3. Jun 6, 2017

zeldaspurpose

In my case, I think it is the resistance of deflection. However, when I search online that is also the definition for Young Modulus. Yet there's these two different equations which is confusing.