Question

What is the Limitations of Newtons second law?​

Answer 1

Newton's second law is not applicable in the case of non-inertial frames, and the third law is violated in relativity.

Answer 2

Newtons second law has its own limitation which is that since the mass will change when the speed will approach to the speed of the light then f=ma wont apply which will be a non-relativistic relationship and that is a strict rule.Hence the statement applies to the constant mass objects of the acceleration.