Andrew's Advice For Understanding Physics

If physics feels hard, you may not yet see its underlying simplicity. True understanding comes when you grasp the core principles.

All of classical mechanics stems from:

F=dpdt⇒mdvdt=maF = \frac{dp}{dt} \Rightarrow m \frac{dv}{dt} = ma

This equation shows that force changes momentum, which in turn causes acceleration.

In circular motion, even if speed is constant, velocity changes direction, meaning momentum changes. Since F=dp/dtF = dp/dt, this requires a force—hence, circular motion always involves acceleration.

Physics isn’t complex—it’s just deeply connected. Find the core idea, and everything follows.