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[" A small ball is projected up a smooth...

[" A small ball is projected up a smooth inclined plane with an initial speed of "10m/s" along the direction at "30^(@)f" of "],[" the bottom edge of the slope.It returns to the edge after "2s" .The ball is in contact with the inclined plane "],[" throughout the process.What is the inclination angle of the plane? "],[qquad (sqrt(x^(2))+x)/(x^(2))=1],[[" (A) "15^(@)," (B) "60^(@)," (C) "37^(@)," (D) "30^(@)]]

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