- 61

- 0

**1. Homework Statement**

A person shakes pendulum with length 3.6 meters. For 12 shakes he measured the time of 38 seconds. Find the acceleration due to gravity

**2. Homework Equations**

T=t/n

T=2*pi*sqrt(l/g)

**3. The Attempt at a Solution**

T(period)=t/n=3.167

T=2*pi*sqrt(l/g) l-length

g=4*(pi)^2*l/T^2

g=14.156

The solution in my book is 9.4 m/s^2. Where is my error?