Explore force fields and molecular dynamics simulations with a focus on nucleic acids in this comprehensive lecture from the second Scientific Workshop for students on "Computational Physics of DNA." Learn from Dr. Francesca Mocci of the Department of Chemical and Geological Sciences at the University of Cagliari as she delves into the fundamental principles and practical applications of molecular dynamics in studying DNA structures and behaviors. Gain valuable insights into the computational methods used to understand nucleic acid dynamics and interactions through detailed explanations and real-world examples during this 71-minute presentation delivered at the Bogolyubov Institute for Theoretical Physics.