At which time (or times) is the particle farthest from the origin?

Question

anonymous · Answer

I think you should have a line equation of your particle to answer this question.

anonymous · Answer

I do, but don't know how to post it that's why i closed the question.

anonymous · Answer

just write it down..

anonymous · Answer

http://i153.photobucket.com/albums/s235/XplicitJ/ScreenShot2013-09-14at71925PM_zpsb49bd8ec.png

anonymous · Answer

a) At which time (or times) is the particle farthest from the origin?
b) At which time (or times) is the particle at rest for only an instant?
c) At which time (or times) is the particle moving away from the origin?
d) At which time (or times) is the particle's acceleration negative?

anonymous · Answer

attachment

anonymous · Answer

i'm not sure but i think that
a-E
b-C
c-B
d-D

anonymous · Answer

Thank you for trying anyway

anonymous · Answer

your welcome