I'm currently self-studying introductory physics. I am able to understand the derivation of equations in my notes, but I find myself struggling to apply calculus in the problem sets. I tend to instinctively solve the questions algebraically, and will begin to really contemplate using calculus only if the question is too complex to solve algebraically. Is this the right approach? I have a nagging suspicion that I'm not approaching the questions at the depth I am supposed to. Sure I can get the correct solution, but it feels as if I took a shortcut of sorts. Is it a problem with me, or is it simply a matter of questions that are too simple?