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A boy is running on the plane road with velocity (v) with a long hollow tube in this hand. The water is
\( \mathrm{P} \)
falling vertically downwards with velocity \( (u) \). At
W
what angle to the vertical, he must incline the tube so that the water drops enters in it without touching its side -
(1) \( \tan ^{-1}\left(\frac{v}{u}\right) \)
(2) \( \sin ^{-1}\left(\frac{v}{u}\right) \)
(3) \( \tan ^{-1}\left(\frac{u}{v}\right) \)
(4) \( \cos ^{-1}\left(\frac{v}{u}\right) \)
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