12th Edition

ISBN: 9780321909107

Author: Paul G. Hewitt

Publisher: PEARSON

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Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth w…

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Textbook Question

Chapter 8, Problem 115RCQ

When a long-range cannonball is fired toward the equator from a northern (or southern) latitude, it lands west of its “intended” longitude. Discuss why this is so. (Hint: Consider a flea jumping from partway out to the outer edge of a rotating turntable.)

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Chapter 8, Problem 114RCQ

Chapter 8, Problem 116RCQ

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་ The position of a particle is described by r = (300e 0.5t) mm and 0 = (0.3t²) rad, where t is in seconds. Part A Determine the magnitude of the particle's velocity at the instant t = 1.5 s. Express your answer to three significant figures and include the appropriate units. v = Value Submit Request Answer Part B ? Units Determine the magnitude of the particle's acceleration at the instant t = 1.5 s. Express your answer to three significant figures and include the appropriate units. a = Value A ? Units

Chapter 8 Solutions

Conceptual Physics (12th Edition)

Ch. 8 - What are the units of measurement for tangential...Ch. 8 - On a rotating turntable, does tangential speed or...Ch. 8 - A tapered cup rolled on a flat surface makes a...Ch. 8 - How does the tapered rim of a wheel on a railroad...Ch. 8 - 5. What is rotational inertia, and how is it...Ch. 8 - 6. Inertia depends on mass; rotational inertia...Ch. 8 - 7. As distance increases between most of the mass...Ch. 8 - 8. Consider three axes of rotation for a pencil:...Ch. 8 - 9. Which is easier to get swinging: a baseball bat...Ch. 8 - Why does bending your legs when running enable you...

Ch. 8 - 11. Which will have the greater acceleration...Ch. 8 - 12. What does a torque tend to do to an object? Ch. 8 - 13. What is meant by the “lever arm” of a...Ch. 8 - 14. How do clockwise and counterclockwise torques...Ch. 8 - 15. If you toss a stick into the air, it appears...Ch. 8 - Prob. 16RCQ Ch. 8 - 17. If you hang at rest by your hands from a...Ch. 8 - Where is the center of mass of a hollow soccer...Ch. 8 - 19. What is the relationship between the center of...Ch. 8 - 20. Why doesn’t the Leaning Tower of Pisa topple...Ch. 8 - 21. In terms of center of gravity, support base,...Ch. 8 - 22.When you whirl a can at the end of a string in...Ch. 8 - 23. Is it an inward force or an outward force that...Ch. 8 - 24. If the string that holds a whirling can in its...Ch. 8 - 25. If you are not wearing a seat belt in a car...Ch. 8 - 26. Why is centrifugal force in a rotating frame...Ch. 8 - 27. How can gravity be simulated in an orbiting...Ch. 8 - 28. Distinguish between linear momentum and...Ch. 8 - 29. What is the law of inertia for rotating...Ch. 8 - If a skater who is spinning pulls her arms in so...Ch. 8 - Contact Grandpa and tell him how you’re learning...Ch. 8 - Prob. 32RCQ Ch. 8 - Prob. 33RCQ Ch. 8 - Prob. 34RCQ Ch. 8 - Prob. 35RCQ Ch. 8 - Prob. 36RCQ Ch. 8 - Prob. 37RCQ Ch. 8 - Torque = lever arm ×...Ch. 8 - 39. Calculate the torque produced by the same 50-N...Ch. 8 - Prob. 40RCQ Ch. 8 - 41. Calculate the force of friction that keeps an...Ch. 8 - Angular momentum =...Ch. 8 - 43. If a persons speed doubles and all else...Ch. 8 - 44. The diameter of the base of a tapered...Ch. 8 - To tighten a bolt, you push with a force of 80 N...Ch. 8 - 46. The rock and meterstick balance at the 25-cm...Ch. 8 - In one of the photos at the beginning of this...Ch. 8 - 48. An ice puck of mass m revolves on an icy...Ch. 8 - 49. If a trapeze artist rotates once each second...Ch. 8 - A small space telescope at the end of a tether...Ch. 8 - 51. The three cups are rolled on a level surface....Ch. 8 - 52. Three types of rollers are placed on slightly...Ch. 8 - 53. Beginning from a rest position, a solid disk...Ch. 8 - 54. You hold a meterstick at one end with the same...Ch. 8 - 55. Three physics majors in good physical shape...Ch. 8 - Prob. 56RCQ Ch. 8 - Prob. 57RCQ Ch. 8 - Prob. 58RCQ Ch. 8 - 59. The wheels of railroad trains are tapered, a...Ch. 8 - Prob. 60RCQ Ch. 8 - 61. The front wheels of a racing vehicle are...Ch. 8 - 62. Which will have the greater acceleration...Ch. 8 - Prob. 63RCQ Ch. 8 - 64. Is the net torque changed when a partner on a...Ch. 8 - Prob. 65RCQ Ch. 8 - 66. When you pedal a bicycle, maximum torque is...Ch. 8 - Prob. 67RCQ Ch. 8 - Prob. 68RCQ Ch. 8 - Prob. 69RCQ Ch. 8 - Prob. 70RCQ Ch. 8 - 71. Explain why a long pole is more beneficial to...Ch. 8 - Prob. 72RCQ Ch. 8 - Prob. 73RCQ Ch. 8 - Prob. 74RCQ Ch. 8 - Prob. 75RCQ Ch. 8 - Prob. 76RCQ Ch. 8 - Prob. 77RCQ Ch. 8 - Prob. 78RCQ Ch. 8 - 79. The centers of gravity of the three trucks...Ch. 8 - Prob. 80RCQ Ch. 8 - Prob. 81RCQ Ch. 8 - Prob. 82RCQ Ch. 8 - 83. When you are in the front passenger seat of a...Ch. 8 - Prob. 84RCQ Ch. 8 - Prob. 85RCQ Ch. 8 - Prob. 86RCQ Ch. 8 - 87. The occupant inside a rotating space habitat...Ch. 8 - Prob. 88RCQ Ch. 8 - A motorcyclist is able to ride on the vertical...Ch. 8 - 90. The sketch shows a conical pendulum. The bob...Ch. 8 - Prob. 91RCQ Ch. 8 - Prob. 92RCQ Ch. 8 - Prob. 93RCQ Ch. 8 - 94. If all of Earth’s inhabitants moved to the...Ch. 8 - Prob. 95RCQ Ch. 8 - If the world’s populations moved to the North Pole...Ch. 8 - Prob. 97RCQ Ch. 8 - 98. Why does a typical small helicopter with a...Ch. 8 - 99. We believe that our galaxy was formed from a...Ch. 8 - Prob. 100RCQ Ch. 8 - Prob. 101RCQ Ch. 8 - Prob. 102RCQ Ch. 8 - Prob. 103RCQ Ch. 8 - 104.When a car drives off a cliff it rotates...Ch. 8 - 105. Discuss why a car noses up when accelerating...Ch. 8 - 106. Discuss how a ramp would help you to...Ch. 8 - 107. Which will roll down an incline faster: a can...Ch. 8 - 108. Why are lightweight tires preferred in...Ch. 8 - 109. A youngster who has entered a soapbox derby...Ch. 8 - 110. The spool is pulled in three ways, as shown....Ch. 8 - 111. Nobody at the playground wants to play with...Ch. 8 - 112. How can the three bricks be stacked so that...Ch. 8 - 113. A long track balanced like a seesaw supports...Ch. 8 - With respect to Diana’s finger, where is the...Ch. 8 - When a long-range cannonball is fired toward the...Ch. 8 - Most often we say that force causes acceleration....

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