Physics

Physics

Problem

The potential energy UU of a particle varies with distance xx from a fixed origin as U=Axx2+BU = \frac{A\sqrt{x}}{x^2 + B} where AA and BB are dimensional constants. The dimensional formula for ABAB is (A) [M1L72T−2][M^1 L^{\frac{7}{2}} T^{-2}] (B) [M1L112T−2][M^1 L^{\frac{11}{2}} T^{-2}] (C) [M1L52T−2][M^1 L^{\frac{5}{2}} T^{-2}] (D) [M1L92T−2][M^1 L^{\frac{9}{2}} T^{-2}] (A) [M1L72T−2][M^1 L^{\frac{7}{2}} T^{-2}] (B) [M1L112T−2][M^1 L^{\frac{11}{2}} T^{-2}] (C) [M1L52T−2][M^1 L^{\frac{5}{2}} T^{-2}] (D) [M1L92T−2][M^1 L^{\frac{9}{2}} T^{-2}]

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