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**1. The problem statement, all variables and given/known data**

The 14-cm-long wrench in the figure swings on its hook with a period of 0.90 s. When the wrench hangs from a spring of spring constant 380 , it stretches the spring 2.8 cm

What is the wrench's moment of inertia about the hook?

cm of wrench is also 14 cm according to pic

**2. Relevant equations**

I = m*g*L*T^2/2pi

(How I found the mass)

Fsp = -ks

Fg = mg

**3. The attempt at a solution**

I=1.08571428*9.8*.14*.028^2/2 pi

Not the right answer not sure what to do or where to go

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