Question

Third times a charm.... I've posted this question twice and gotten them wrong twice. Hopefully someone can help me figure this one out.

A 1.40-g spider oscillates on its web, which has a damping constant of b = 3.50×10⁻⁵ kg/s . How long does it take for the spider's amplitude of oscillation to decrease by 18.0 % ?

The last two answers were 137.18 secs (which was wrong) and 6.88 secs (which was wrong as well).

Answer 1