The position of a particle attached to a vertical spring is given by y = (yo cos wt)j . The y axis points upward, yo = 15.3 cm, and w = 22.50 rad/s. (a) Find the displacement of the particle during the time interval from t = 0 to t = 8.1 s. (Round your answer to the nearest integer.) 0.153 X Consider carefully whether the correct answer is exactly zero, or just a very small number. m What does your answer mean? This answer has not been graded yet. (b) Find the distance (in centimeters) the particle traveled during this time interval. 1775 cm How can this distance be larger than the magnitude of the displacement? This answer has not been graded yet. c) Many physical systems are modeled by a particle attached to a spring. List some examples of systems that may be modeled by springs. It may be helpful to use the index of this book or the Internet