A particle is thrown with a speed \( u \) at an angle \( \theta \) with the horizontal. When the...

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A particle is thrown with a speed \( u \) at an angle \( \theta \) with the horizontal. When the particle makes an angle \( \phi \) with the horizontal. Its speed changes to \( v \) :
(A) \( v=u \cos \theta \)
(B) \( \nu=u \cos \theta \cdot \cos \phi \)
(C) \( v=u \cos \theta \cdot \sec \phi \)
(D) \( v=u \sec \theta \cdot \cos \phi \)
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