Submitted by Anonymous (not verified) on
Forums:
I'm up to the part where it says hence find the furthest distance from O. I have sketched a graph of Y on x which is a quadratic intersecting the x-axis at +−u2/g, but I can't seem to find its relevance to finding the maximum distance from O. Any help would be great please.
The distance from the origin
Submitted by stcs on
The distance from the origin squared is x2+y2, so for any given x the greatest distance squared is x2+Y2. You just need to max this as a function of x. Your sketch may help a bit, but it is a calculus (or completing-the-square) problem now.