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anonymous
 one year ago
A man points his boat due east and rows at 4 km h^1 relative to the water. The river flows south at 2 km h^1, and it is 1 km wide.
a) How fast is the man moving relative to the shore?
b) Where will he land?
c) How long will his trip take?
Please help, I have no idea how to do this, thanks
anonymous
 one year ago
A man points his boat due east and rows at 4 km h^1 relative to the water. The river flows south at 2 km h^1, and it is 1 km wide. a) How fast is the man moving relative to the shore? b) Where will he land? c) How long will his trip take? Please help, I have no idea how to do this, thanks

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BAdhi
 one year ago
Best ResponseYou've already chosen the best response.2relative to the water his movement is 4 to the east... but the water is flowing to the south.. according to the relative velocity identity, \(V(b,s) = V(b,w)+V(w,s)\) b is boat, s is shore and w is water. V(b,s) is velocity of the boat relative to the shore. other expressions have the similar meaning dw:1442463193079:dw you can find the resultant velocity with the vector addition and it will be equal to \(V(b,s)\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How do I find out where he will land?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And the time as well? I'm still a bit confused

BAdhi
 one year ago
Best ResponseYou've already chosen the best response.2now that you know his velocity with reference to the ground, its jst a matter of using motion equations... dw:1442463807902:dw from \(V(b,s)\) you know the value of \(\theta\) so find the value of x,and the distance he will land , since you know x and v(b,s) you can find the time taken to travel
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