practice test 2

practice test 2 - PRACTICE TEST#2 Physics 1021 NAME 1 Two...

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PRACTICE TEST #2 Physics 1021 NAME:___________________________ 1. Two horizontal curves on a bobsled run are banked at the same angle, but one has twice the radius of the other. The safe speed (no friction needed to stay on the run) for the smaller radius curve is v. What is the safe speed on the larger radius curve? a. approximately 0.707 v b. 2v c. approximately 1.41v d. 0.5 v 2. A hypothetical planet has a mass of half that the Earth and a radius of twice that of the Earth. What is the acceleration due to gravity on the planet in terms of g, the acceleration due to gravity at the Earth? a. g b. g/2 c. g/4 d. g/8 3. Does the centripetal force acting on an object do work on the object? a. Yes, since a force acts and the object moves, and work is force times distance. b. Yes, since it takes energy to turn the object c. No, because the object has constant speed. d. No, because the force and the displacement of the object are perpendicular. 4.

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This note was uploaded on 04/07/2008 for the course PHYS 1021 taught by Professor Borovitskaya during the Spring '08 term at Temple.

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practice test 2 - PRACTICE TEST#2 Physics 1021 NAME 1 Two...

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