- #1

AbigailG

- 12

- 1

## Homework Statement

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A solid sphere of mass M and radius R is suspended from a thin rod. The sphere can swing back and forth at the bottom of the rod. Find an expression for the frequency of small angle oscillations.

## Homework Equations

f = 1/2(pi) sqrt(MgR/I)

I for a solid sphere 2/5MR^2

## The Attempt at a Solution

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I simply plugged the moment of inertia into the equation for the frequency and that yielded:

1/2(pi) sqrt(5g/2R)

but the answer is:

1/2(pi) sqrt(5g/7R)

Does anyone know what my missing is?