Quiz 8

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University Of Arizona *

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102

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Physics

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Dec 6, 2023

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3

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Question 1 (2 points) Saved Listen A circular disk of radius 0.015 m rotates with a constant angular speed of 5.0 rev/s. What is the acceleration of a point on the edge of the disk? Question 1 options: A) 0.31 m/s2 B) 1.6 m/s2 C) 9.9 m/s2 D) 15 m/s2 E) zero m/s2 Question 2 (2 points) Saved Listen A 1.0-m roulette wheel reaches a maximum angular speed of 18 rad/s before it begins decelerating. After reaching this maximum angular speed, it turns through 35 revolutions (220 rad) before it stops. How long did it take the wheel to stop after reaching its maximum angular speed? Question 2 options: A) 12 s B) 48 s C) 3.7 s D) 8.8 s E) 24 s Question 3 (2 points) Saved Listen
What is the tangential speed of Nairobi, Kenya, a city near the equator? The earth makes one revolution every 23.93 h and has an equatorial radius of 6380 km. Question 3 options: A) 74.0 m/s B) 116 m/s C) 148 m/s D) 232 m/s E) 465 m/s Question 4 (2 points) Saved Listen A fan rotating with an initial angular velocity of 1000 rev/min is switched off. In 2 seconds, the angular velocity decreases to 200 rev/min. Assuming the angular acceleration is constant, how many revolutions does the blade undergo during this time? Question 4 options: A) 10 B) 20 C) 100 D) 125 E) 1200 Question 5 (2 points) Saved Listen What is the tangential speed of a lug nut on a wheel of a car if the lug nut is located 0.114 m from the axis of rotation; and the wheel is rotating at 6.53 rev/sec? Question 5 options:
A) 0.745 m/s B) 1.49 m/s C) 2.98 m/s D) 4.68 m/s E) 9.36 m/s
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