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
Stacey Warren - Expert brainly.com
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relative 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
you can find the resultant velocity with the vector addition and it will be equal to \(V(b,s)\)
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now that you know his velocity with reference to the ground, its jst a matter of using motion equations...
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