1. A 2.00-kg object is attached to a spring. The force constant of the spring is k=196 N/m. The object is held a distance 5.00 cm from the equilibrium position and is released at t 0. (a) Find the angular frequency w, (b) the frequency f, (c) the period T and (d) write x (in cm) as a function (cosine) of time. 2. Find the period of a simple pendulum of length 1.00 m. 3. The tension in a string is provided by hanging an object of mass m=3.00 kg at one end as shown in the figure below. The length of the string is L=2.50 m and its mass is ms= 50.0 g. What is the speed of waves in m/s on the string? 3ky 4. The frequency of a car horn is 400 Hz. Find (a) the wavelength of the sound, and (h) the frequency observed if the car moves with a speed , = 34.0 m/s through still air toward a stationary receiver. Take the speed of sound in air to be 340 m/s. (c) Find the frequency observed if the car is stationary and a receiver moves with a speed us= 34.0 m/s toward the car