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anonymous
 5 years ago
How do I solve these types of problems?
'A ferry heads west across a river. It travels 20 miles per hour in still water. The river flows south at 15 miles per hour. In which direction will the ferry actually travel. How fast will it travel?'
I need someone to explain this, so that I can do the other problems like it.
anonymous
 5 years ago
How do I solve these types of problems? 'A ferry heads west across a river. It travels 20 miles per hour in still water. The river flows south at 15 miles per hour. In which direction will the ferry actually travel. How fast will it travel?' I need someone to explain this, so that I can do the other problems like it.

This Question is Closed

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1its a vector related problem

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1add the vector to get the red travel distance vector

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1<20,0> is the westward vector ; and <0,15> is the southward vector

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the new vector is simply: <20,0> <0,15>  <20,15>

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the direction traveled is the tan^1 (y/x) + pi

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.115/20 = 3/4 tan^1(3/4) =abt 233.13 degrees if i did it right

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1had to add 270 to it to get itin the proper qudrant

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1and the distance traveled is just the pythag of the y and x components

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1any of this make sense?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1hmm.... a vector is just an arrow that points in any direction and indicates the distance traveled; they can be called directed line segments

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1when we add them, they form a new arrow that measures a new direction and length

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1you essentially have the ferry being thrown off course by the river; by 15 meters every sec right?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1well; 15 miles for every hour travled

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1if we pythag the new direction; we get 20 west; and 15 south; those are the legs of a triangle and the distance actually covered in one hour is the hypotenuse of that triangle

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1sqrt(20^2 + 15^2) = distance traveled in one hour

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1in this case; its moved 25 miles in one hour...... or 25 mph

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the direction it moved is to the south and west...measured from some starting point; usually idicated as due est

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1due east is the inital starting point of angle measures...

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1any of this ringing bells yet :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I understand better now, thank you for helping me so much :)
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