4. A conducting bar of mass m = 14.0 g can slide freely on two parallel conducting rails positioned at an incline of a =

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4 A Conducting Bar Of Mass M 14 0 G Can Slide Freely On Two Parallel Conducting Rails Positioned At An Incline Of A 1 (63.75 KiB) Viewed 18 times

4. A conducting bar of mass m = 14.0 g can slide freely on two parallel conducting rails positioned at an incline of a = 15.0°. The resistance of the bar is R = 0.210 02. The rails are connected at their base by a piece of conducting material. The base is parallel to the y axis of a rectangular reference frame xyz and the rails are in x-z plane. The distance between the rails is w = 0.120 m. Neglect the thickness of the rails, the resistance of the rails and the resistance of the connection between them at the base. A uniform magnetic field B with magnitude 0.530 T is exactly vertical as shown in the figure. If the bar slides down the incline at a constant (terminal) speed of 1.10 m/s, what is the coefficient of kinetic friction μk between the rails and the bar? Use the value of g = 9.80 m/s². N →X