20-1 Troubles with classical physics The kinematics developed by galileo and the mechanics developed by Newton, which form the basis of what we call"classical physics, had many triumphs. However, a number of experimental phenomena can not be understood with these otherwise successful classical theories 1. Troubles with our ideas about time The pions( or z created at rest are observed20-1 Troubles with classical physics The kinematics developed by Galileo and the mechanics developed by Newton, which form the basis of what we call “classical physics”, had many triumphs. However, a number of experimental phenomena can not be understood with these otherwise successful classical theories. 1. Troubles with our ideas about time The pions ( or ) created at rest are observed +  − 