10.3#14

Mr. Taylor,

I just don't understand this question at all, and as you can

probably see I've tried it a ton of different times

Thank you for any help

**************************Well you clearly do understand something since you got the a) correct.  It *looks like maybe* you tried to do part b) correctly too, except you made a wee little mistake subtracting the one vector from the other.  I can't tell though, because *you didn't tell me what you did*.  May I suggest that you do that when send me a question?--it usually is a better teaching moment if I can tell you exactly where you made a mistake.   BTW, we used exactly the terminology this vector parallel and that vector perpendicular in the lecture notes from last Wednesday and/or Friday, and those lecture notes are already posted here in the blog, and this stuff is also discussed in section 10.3 in the textbook.  I didn't lecture on the stuff about work, but is also discussed in the textbook in glorious detail.  The upshot is that the work is defined  as the Force vector dot product with the displacement vector.