Question

1. Rain is falling vertically with the speed of 20m/s, wind starts blowing after some
time with a speed of 20m/s in East to West direction. In which direction should a
boy waiting in a bus stop hold his umbrella? ( give answer with figure )

Answer 1

Answer:

The direction of the resultant velocity vector with the vertical is given as,

θ=tan

−1

(

v

r

v

w

)

θ=tan

−1

(

20

12

)

=30.96

∘

Thus, the direction of umbrella should be towards east making an angle of 30.96

∘

with the vertical.

Answer 2

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