Do you know your physics laws?Online version Perfect physics game to test your ability! by Daira Raquel Fernandez Espinosa 1 Group 1 2 Group 2 3 Group 3 For every action there is an equal or positive re-action Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed on it. Newton's Laws the variable in an equation which represents a conserved quantity is constant over time. It has the same value both before and after an event. Conservation of Energy Special Relativity the laws of physics are the same for all non-accelerating observers the speed of light within a vacuum is the same no matter the speed at which an observer travels.