A small fly of mass 0.30 gg is caught in a spider's web. The web oscillates predominantly with a frequency of 3.5 Hz. What is the value of the effective spring stiffness constant k for the web?

A mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. It takes 3.2 JJof work to compress the spring by 0.15 mm. If the spring is compressed, and the mass is released from rest, it experiences a maximum acceleration of 12 m/s2m/s2. Find the value of the spring constant.Find the value of the mass.

A cord of mass 0.70 kgkg is stretched between two supports 8.6 mm apart. If the tension in the cord is 120 NN , how long will it take a pulse to travel from one support to the other?