A 137 kg horizontal platform is a uniform disk of radius 1.97 m and can rotate about the vertical axis through its center. A 66.7 kg person stands on the platform at a distance of 1.07 m from the center, and a 28.5 kg dog sits on the platform near the person 1.45 m from the center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis.
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An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)
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A 137 kg horizontal platform is a uniform disk of radius 1.97 m and can rotate about the vertical ax...
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