I've heard from a physics professor that there's no stationary platform to observe and analyze a body in motion. Why did he mention that? Is it because even seemingly stationary objects like a parked car on a road moves along with the Earth's rotation?
As per my intuition there is a stationary platform. If you or your car is at rest then that becomes a stationary platform and you can study the kinematics of other objects. Am I right??
Also what is a frame of reference? Which one is inertial and non inertial?
(I might have not framed the question correctly. Apologies for that.)