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Sample examination questions Accelerating reference frames: The Foucault pendulum 1. (Note: This problem can also serve as a post-test for Accelerating reference frames: Rotating frames.) The diagrams below show a coordinate system fixed to the surface of the Earth at a northern latitude . w® w® E (north) Ùj¢ E Ù k¢ Ù j¢ (up) Ù k¢ Ù i¢ Ù i¢ l (east) Equator Equator A particle at this latitude moves with horizontal velocity v¢ = ( v¢o cos b ) iˆ¢ + ( v¢o sin b ) ĵ¢ . Show that the horizontal component of the Coriolis “force” has a magnitude that is independent of the value . Clearly show all work. ©2013 Physics Department, Grand Valley State University, Allendale, MI.