A particle is projected from ground making an angle with horizontal. After some time its velocity vector makes an angle of $$60o$$ with horizontal at point A, after $$1$$ second the particle is at point B and its velocity vector makes an angle of $$30o$$ with horizontal. Then velocity of the particle at A is

Question

A particle is projected from ground making an angle with horizontal. After some time its velocity vector makes an angle of $$60o$$ with horizontal at point A, after $$1$$ second the particle is at point B and its velocity vector makes an angle of $$30o$$ with horizontal. Then velocity of the particle at A is

Infinity Learn · Accepted Answer

Horizontal component of velocity remains unchanged ∴$$v1$$ $$cos60o=v2$$ $$cos30o$$⇒$$v2=v13Again$$ $$v2$$ $$sin30o=v1$$ $$sin60o-gt$$⇒$$v13$$ x $$12=v1$$ x $$32-10$$ x $$1$$⇒$$v1=103$$ $$m/s$$

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A particle is projected from ground making an angle with horizontal. After some time its velocity vector makes an angle of 60o with horizontal at point A, after 1 second the particle is at point B and its velocity vector makes an angle of 30o with horizontal. Then velocity of the particle at A is

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