- #1
- 2
- 0
Homework Statement
The length of the rod of a certain pendulum is decreased, and the period then decreases by 20%. By how much was the rod length decreased?
Homework Equations
T=2π√(l/g)
T=period
l=length of the rod
g=acceleration due to gravity
The Attempt at a Solution
I know how to solve the problem, I just don't know how to do the math to solve for l (length).