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Unformatted text preview: List “midterm02  Mar 06 2006” in class PHY 303KFlorinSpring 2008. 1 Question 1, chap 6, sect 3. part 1 of 1 0 points Barrel of Fun 05 (599) An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that any person inside is held up against the wall when the floor drops away (see figure). The coefficient of static friction between the person and the wall is μ and the radius of the cylinder is R . ω R What is the minimum tangential velocity needed to keep the person from slipping down ward? 1. v = radicalBigg g R μ 2. v = radicalbig g R 3. v = 2 radicalbig g R 4. v = 1 2 radicalbig g R 5. v = μ radicalbig g R 6. v = 2 μ radicalbig g R 7. v = μ radicalbig 2 π g R 8. v = radicalbig 2 μg R 9. v = μ radicalbig 2 g R 10. v = 1 μ radicalbig g R Question 2, chap 6, sect 99. part 1 of 1 0 points Ferris Wheel 01 (2443) The following figure shows a Ferris wheel that rotates 4 times each minute and has a diameter of 18 m. The acceleration of gravity is 9 . 8 m / s 2 . What force does the seat exert on a 40 kg rider at the lowest point of the ride? Answer in units of N. Question 3, chap 6, sect 99. part 1 of 1 0 points Over the Crest (5229) A(n) 20 kg boy rides a roller coaster. The acceleration of gravity is 9 . 8 m / s 2 . With what force does he press against the seat when the car moving at 6 m / s goes over a crest whose radius of curvature is 10 m? Answer in units of N. Question 4, chap 6, sect 99. part 1 of 1 0 points Vertical Circle 06 (8943) An object attached to the end of a string swings in a vertical circle of radius 1 . 2 m as shown. At an instant when θ = 30 ◦ , the speed of the object is 5 m / s and the tension in the string is 20 N. The acceleration of gravity is 9 . 8 m / s 2 . 5 m / s 2 N 1 . 2 m 30 ◦ 9 . 8 m / s 2 What is the mass m of the object? List “midterm02  Mar 06 2006” in class PHY 303KFlorinSpring 2008. 2 Answer in units of kg. Question 5, chap 6, sect 3....
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This note was uploaded on 02/03/2010 for the course PHY 303K taught by Professor Turner during the Spring '08 term at University of Texas at Austin.
 Spring '08
 Turner
 Physics

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