Posted by Kaan on Wednesday, October 17, 2012 at 3:13pm.
A boat’s speed in still water is 1.95m/s . The boat is to travel directly across a river whose current has speed 1.20m/s .
Determine the speed of the boat with respect to the shore.
Despite, I did it like taking the sqrt (1.95^2+1.20^2)
is there something wrong I did?
Thank you for your care.

Physics  bobpursley, Wednesday, October 17, 2012 at 3:22pm
respect to the shore?
The boat has to head upstream, and that velocity is countered by the stream:
v=sqrt(1.95^21.2^2)
So the slant angle reduces the speed across. 
Physics  Kaan, Wednesday, October 17, 2012 at 3:26pm
Oh yes, u r right, didn' t care it, ty so much