# A particle is projected at an angle of 60° above the horizontal with a speed of 10 ms−1 . After some time the direction of its velocity makes an angle of 30° above the horizontal. The speed of the particle at this instant is

Question : A particle is projected at an angle of 60° above the horizontal with a speed of 10 ms−1 . After some time the direction of its velocity makes an angle of 30° above the horizontal. The speed of the particle at this instant is

(A) $\dfrac{5}{\sqrt{3}}ms^{-1}$

(B) $5\sqrt{3}ms^{-1}$

(C) $5ms^{-1}$

(D) $\dfrac{10}{\sqrt{3}}ms^{-1}$