# Another amplitude and oscillation problem

LBRRIT2390

## Homework Statement

A small earthquake starts a lamppost vibrating back and forth. The amplitude of the vibration of the top of the lamppost is 6.5 cm at the moment the quake stops, and 8.0 seconds later it is 1.8 cm.

A. What is the time constant for the damping of the oscillation? _____ seconds

B. What was the amplitude of the oscillation 4.0 s after the quake stopped? _____ cm

A. ?

B. ?

## The Attempt at a Solution

Don't know where to start

Homework Helper
Hi LBRRIT2390!

What is the standard equation for damped motion with time constant T?

LBRRIT2390
I honestly have no idea