InterviewSolution
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InterviewSolution
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A conical pendulum consists of a simple pendulum moving in a horizontal circle as shown in the figure. `C` is the pivot, `O` the centre of the circle in which the pendulum bob moves and `omega` the constant angular velocity of the bob. If `vecL` is the angular momentum about point `C`, then A. `vecL` is constantB. only direction of `vecL` is constantC. only magnitude of `vecL` is constantD. none of the above |
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Answer» Correct Answer - C The distance of `vecL` is perpendicular to the line joining the bob at point `C`. Since this line keeps changing its orientation is space, direction of `vecL` keeps changing, however, as `omega` is constant, magnitude of `vecL` remains constant. Method 2 The torque about point is perpendicular to te angular momentum vector about point `C`. hence it can only change the directon of `L` and not its magnitude. |
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