Newtonian physics -- like any scientific paradigm -- was abandoned when it could no longer explain physical reality. Newton's theories on the nature of light was abandoned when it could not explain interference. His ideas of gravity were shown to be only an approximation when it was shown it could not explain the bending of star light near a large mass. And his basic ideas of space and time have also been shown to be not in accord with experiment.
Newtonian Mechanics
Newtonian and Quantum
Newtonian physics....etc.
Classical (or Newtonian) and Quantum.
Gravitational Physics is Newtonian Physics! Quaternion Gravity will be an advance, when Gravitational Energy is recognized to be: E = Newtonian Energy (-mu/r) and vector Energy (mcV) = -mu/r + mcV.
Typically, there are considered two forms of physics. Newtonian and modern. Newtonian relates to Newton-era mechanics and E&M. Modern physics loosely refers to post-newton physics. Modern physics primarily refers to 20th century physics as it incorporates relativity and quantum theory.
Newtonian physics, also called classical or pre-relativistic physics refer to the physics after Aristotelian physics and before the 1920s when the theory of relativity was formed. They distinctly differ from Aristotelian physics in that they cover the physics of motion, scientific method, describe contact and non-contact forces such as magnetism
3 laws of newtonian physics
If by "the laws of physics" you mean to include quantum mechanics, then yes. If you mean purely Newtonian physics, then they imply the exact opposite.
When speeds exceed 0.1 c.
Mass is a constant Quantity according to Newtonian Physics.
Free fall in Newtonian physics is when a body has reached terminal velocity and so cannot speed up any more. It is therefore just falling at a set pace and will not reduce or increase that speed.