Question

Captain Kiddo is being chased by a black mamba when she suddenly gets to a river bank, after a quick examination of the situation she decides to cross the river but she estimates that the water current is at least twice stronger than her top swimming speed. a) In which direction should she start swimming such that she can cross the river in the least possible time? b) After crossing the river, will she end up right across the point she started swimming, upstream or downstream the river? Captain Kiddo is also considering a long jump to cross the river, she could use a ninja kick to get extra initial velocity which could be enough to get to the other side of the river if the air resistance is negligible. c) What factors should she consider before jumping?

Answer 1

Rive current V_k = velocity of captain a) The direction should be perpendicular to the river current b) she will go down stream river c) Factor: i) The width of the river ii) Angle at which she should jump iii) The launch speed