4. A student needs to get directly across a river that is 92 m wide. She is standing on the southern bank and has a boat that can travel at a speed of 4.0 m/s, but the current is travelling at 2.5 m/s [E]. [A-5] (a) What is the resultant velocity of the boat if she points it straight across the river?
(b) How far downstream is she away from her destination after reaching the other bank of the river?
a) So resulant velocity vec(V)_(R)= vec(V)_(b gamma)+ vec(V_(gamma))=> vec(V_(R))=4 hat(ȷ)+2.5 hat(ı):'V_(R)=sqrt(4^(2)+(2.5)^(2))quad:'V_(R)=4.7 ... See the full answer