Question: A particle is projected up an inclined plane with initial speed 𝑣 = 20ms −1 at an angle θ = 30° with plane. The component of its velocity perpendicular to plane when it strikes the plane is
(A) 10\sqrt{3}ms^{-1}
(B) 5\sqrt{3}ms^{-1}
(C) 10ms^{-1}
(D) Data is insufficient
Answer: option (C)
Solution:
