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NTA Abhyas JEE Main2020PhysicsMotion in Two DimensionsPractice

A horizontal smooth square platform ABCD is moving towards the right with a uniform speed v . At what angle θ must a particle slide from A , on the platform, with speed u so that it strikes the point B ? (Assume u to be uniform and u > v )

Options

  1. Asin -1 u v
  2. Bcos -1 v u
  3. Ccos -1 u v
  4. Dsin -1 v u

Correct answer

B. cos -1 v u

Step-by-step solution

⇒ u cos θ t = v t ⇒ u cos θ = v cos θ = v u θ = cos -1 v u

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