Question

A girl is walking in the rain at a speed of
1.2 ms-1 along a straight road. The rain falls
on her vertically at a speed of F4 ms 1 . At
what angle to the vertical does the person
hold the umbrella so that she does not get
wet ?

Answer 1

$Vm= 1.2m/s$

$Vr= 1.4m/s$

Let $\theta$ b the angle the girl is supposed to walk.

$tan\theta= \frac {Vr}{Vm}$

$tan\theta= \frac {1.4}{1.2}$

$tan\theta= 1.167$

$\theta= 49.41\degree$