80 :| :| Death.
EDIT:
Ok, thought I'd put what I think I lost marks on... So I don't forget..
3. Two block acceleration.(-1)
4. Consequently the Ek(-1)
5. Put one for weight, and one arrow straight up(reaction) (-1)
6. Wrote 57
o not 5.7
o xD (-1)
13. Spring constant; used energy.. (-1 or 2)
14. Change in energy of spring-mass system; I said 0J, it was 4J ... Perhaps a glimmer of hope for consequential... (-1 or 2)
17. Thought it was talking about Ek... Not momentum (-2)
Structures
4. No idea what this is lol, but everyone says it was C; I chose D.. (-2?) hopefully got this right

...
EDIT: After looking at the exam I am certain I chose C. But the sheet I brought home says D :| hopefully I got it right.