- #1

- 2,285

- 5

## Homework Statement

I am trying to find a damping ratio. I know ##k=50## lb##_f##/in, ##m=50## lb, ##c = 0.75## lb##_f##-sec/in.

## Homework Equations

##1## lb##_f##/in = ##175.1268## N/m

##1## lb = ##0.4536## kg

## The Attempt at a Solution

Then ##k = 8756.34## N/m, ##c = 131.345## N/m-sec, and ##m = 22.675## kg.

$$

\zeta = \frac{c}{2\omega_nm} = \frac{131.345}{2(0.00259)(22.675)} = 1000.26

$$

but this seems awfully large. Are my conversion factors incorrect?