Mechanics question (1 Viewer)

[Hermes1]

Question 6 (a) (iv) of this trial paper:

http://www.angelfire.com/ab7/fourunit/sydneygrammar2010.pdf

i let the conditions to find C be x = 0 and v = 0 but then how do i solve for v.
i let x = 212 but it doesnt seem to work.

 

[kmlb123]

I'm going to take a guess here, but if you're left with a variable (i.e. v) and log natural of v, then I would take a graphical or testing approach rather than trying to do an algebraic approach (test v = 80, describe behaviour as v --> 100 and vice versa, and since v<80 (to make your end statement true if you've used this approach) then you can say the end velocity is less than original).