1.

62. A bo is running on the plane road with velocity(v) with a long hollow tube in his hand. The wateris falling vertically downwards with velocity (u). Atwhat angle to the vertical, he must incline the tubeso thatthe water drops enters in it without touchingits side --1(1) tan(2) sin(3) tan(4) cos

Answer»

The velocity of boy running horizontal is = vi

now velocity of water is downward = -uj ... ( +j taken in upward direction)

so, the velocity of water w.r.t boy will be = -uj-vi

and angle will tan∅ = vertical/horz = -u/-v

so, ∅ = tan-¹(u/v)

option 3



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