<p>I'm desperately stuck on these two problems and would greatly appreciate some help!</p>
<p>14.62 part c
How long does it take the amplitude to decrease to one-quarter of its initial value? </p>
<p>and 14.26
Write the formula for the subsequent motion in terms of m, k, J, and t. Assume x=0 at t=0. </p>
<p>Thanks!</p>