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## Homework Statement

1. write newton's law in terms of s'' theta and g for a pendulum

2. define s'' in terms of theta''

## Homework Equations

## The Attempt at a Solution

1.

G = -mgsin theta

and G = m s''

but i can't get all three of the required variables into one formula

2.

s'' = -g sin theta

i can't get to theta'' i thought about doing intergrals but i can't figure it out