its been a while since i've taken physics. but in regard to your potential energy question i think there is an equation that you use, but i dont remember what is was. but i do remember that with physics your textbook will be your best friend. it has all the answers in it. they might be set up differently but the idea is the same. have you tried reading the whole chapter? you cant cut corners in this type of subject
ok im thinking elastic PE formula q1 is PE = 1/2kx^2...
idk can you just throw the question out there and see if we can figure it out?
I used to be, but I've pretty much forgotten everything. Sorry.
I think B3Na01 has the right idea. Throw the question out and see who can answer. Maybe I'll surprise myself. LOL