I'm now learning German in Duolingo, and I noticed a correlation between how hard it is for me to learn one more pack of a vocabulary and how this vocabulary is relevant for me.
There is nothing that I cannot understand, but when some words do not relate to my needs I need to make a conscious effort to learn them. When the words are the ones I'd happily use, I'll learn them easily without any effort, I just need to spend enough time with Duolingo.
I believe that people who do not care about physics are having the very same issues with calculus that was explained with references to physics. Probably they can overcome this difficulties, like I can overcome my difficulties with uninteresting words, but it means they need to spend more effort and more time to get the same result.
There is nothing that I cannot understand, but when some words do not relate to my needs I need to make a conscious effort to learn them. When the words are the ones I'd happily use, I'll learn them easily without any effort, I just need to spend enough time with Duolingo.
I believe that people who do not care about physics are having the very same issues with calculus that was explained with references to physics. Probably they can overcome this difficulties, like I can overcome my difficulties with uninteresting words, but it means they need to spend more effort and more time to get the same result.