3. A 230.0 g object on a spring oscillates on a frictionless horizontal surface with frequency 2.00 Hz and amplitude 8.0 cm. Its position of time is given by r = Asin(wt) . A sketch a graph of the elastic potential energy as a function of time. (b) Graph the system's kinetic energy and potential energy as a function of time. (c) Describe qualitatively how your answers would change if the surface weren't frictionless.[6]

3. A 230.0 g object on a spring oscillates on a frictionless horizontal surface with frequency 2.00 Hz and amplitude 8.0 cm. Its position of time is given by r = Asin(wt) . A sketch a graph of the elastic potential energy as a function of time. (b) Graph the system's kinetic energy and potential energy as a function of time. (c) Describe qualitatively how your answers would change if the surface weren't frictionless.[6]