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A truck is moving with velocity u. An object is projected from the truck with velocity u making an angle of 60^o with horizontal as seen from the truck. What is the angle of projection as seen from ground?

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30o

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detailed solution

Correct option is C

If α1 be the angle of projection as seen from the ground, then tan α1=usinαu+ucosα=sinα1+cosα=sin60o1+cos60o=13⇒α1=30o

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A truck is moving with velocity u. An object is projected from the truck with velocity u making an angle of 60o with horizontal as seen from the truck. What is the angle of projection as seen from ground?

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A truck is moving with velocity u. An object is projected from the truck with velocity u making an angle of 60^o with horizontal as seen from the truck. What is the angle of projection as seen from ground?