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Unformatted text preview: final velocity? How long does it take for a sphere to reach pure rolling motion? d) Once the cylinder has obtained pure rolling motion it reaches a new, perfectly smooth surface with μ s,2 = 0. Explain why or why not the center of mass velocity is affected by the new surface. e) Discuss what would happen if the spinning cylinder would have been initially lowered onto a perfectly smooth surface. (50 marks) Relativistic Archer 2) Oliver, standing at the rear end of a railroad car of length 100m, shoots an arrow toward the front end of the car. He measures the velocity of the arrow as 0.3c. Ashlee, who was standing on the platform, saw all of this as the train passed her with a velocity of 0.75c. Determine the following as observed by Ashlee: a) The length of the car. b) The velocity of the arrow. c) The time taken by an arrow to cover the length of the car. d) The distance covered by the arrow. (50 marks)...
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- Fall '10