An electric passenger train goes at 73 km/h in the direction of south east. A wind is blowing from the south at 31 km/h.

What is the direction that the smoke from the train is blowing and at what speed?

(In reply to re(2): Old Smokie by nellie)

I could be wrong .. but I used vector mechanics to analytically solve this problem. You can also do it graphically.

Draw a cordinate (xX' - yY') like a big plus sign
where x = north, X' = south, y = West, Y = East
From the origin, draw a line at 45 degree angle which is 7.1 cm long (to represent 71 km/h)
From the other end of this line (the end that is farther from teh origin), draw aline vertically up 3.1 cm long.

Join the other end of this vertical line to the origin, measure the length, and the angle.

I am trying to draw a picture:

N |
|
|
|
W-------------------- E
|\
| \
| \
| \ |
| 7.1 \ |3.1
| \ |
| \|
|
S

Thanks for your review.

Posted by anoop on 2003-06-21 21:26:16