Question

A swimmer starts from point A on the bank of 200 m wide river, crosses the
river to reach opposite bank. He returns to the point B on the original bank
such that AB = 300m in the downstream direction. Find the magnitude and the
direction of the velocity of the swimmer relative to the bank if his velocity
w.r.t.to river is always perpendicular to the bank.​

Answer 1

Answer:

using Pythagoras theorem,

sin [theta] = opposite side/ hypotenuse =200/300=2/3

angle is sin^-1(2/3) = 41.81 degree

opp^2+adj^2=hyp^2

4+adj^2=9

adjacent side=sqrt (5)

=2.236m

this is the magnitude of swimmer

direction is along the stream direction