<![CDATA[Math Is Fun Forum / Understanding boat-river problem]]>2012-11-22T16:39:27ZFluxBBhttp://www.mathisfunforum.com/viewtopic.php?id=18455<![CDATA[Re: Understanding boat-river problem]]>If the boat is driven by the current then there's no force relative to the stream. I would stick to velocities.

Bob

]]>http://www.mathisfunforum.com/profile.php?id=676942012-11-22T16:39:27Zhttp://www.mathisfunforum.com/viewtopic.php?pid=240877#p240877<![CDATA[Understanding boat-river problem]]>Today while solving a boat / river problem, I wasn't convinced of vector drawing to find velocities. I was thinking of force acting on the boat which affects its position and velocity. But I couldn't think clearly of FORCE equation to find displacement, accelerations etc. Please help me. Assume river velocity : VR, Boat still water velocity : VB, Distance from Point A to B = D (straight distance from bank to bank). Now please explain how to find position of the boat in the form r = f(Ө) .]]>http://www.mathisfunforum.com/profile.php?id=1955282012-11-22T16:35:43Zhttp://www.mathisfunforum.com/viewtopic.php?pid=240875#p240875