Kinematics Question 657
Question: A man in a row boat must get from point A to point B on the opposite bank of the river . The distance$ BC=a $ . The width of the river$ AC=b $ . At what minimum speed u relative to the still water should the boat travel to reach the point B? The velocity of flow of the river it’s $ v _{0} $ .
Options:
A) $ \sqrt{{{a^{2}}}}\text{+}{{b^{2}}}/{{v _{0}}} $
B)$ \frac{{{v _{0}}}\text{b}}{\sqrt{{{a^{2}}}}\text{+}{{b^{2}}}} $
C) $ {{v _{0}}}\text{a/b} $
D)$ {{v _{0}}}\text{b/a} $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ \frac{{{\text{v}} _{\text{0}}}\text{b}}{\sqrt{{{\text{a}}^{\text{2}}}\text{+}{{\text{b}}^{\text{2}}}}} $
