There seems to be quite a few questions in EK's 1001 physics book about solids and modulus. I never learned it in TPR nor in my college physics class. Worth learning?
Step 1: go to the AAMC website
Step 2: check the List of Physics topics
Step 3: if it's on there, in any form (hint: elasticity is, and modulus is a part of that), it's worth learning.