Conceptual Physics / MasteringPhysics (Book & Access Card)
12th Edition
ISBN: 9780321908605
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 8, Problem 66RCQ
To determine
That maximum torque is produced when the pedal sprocket arms are horizontal while peddling a bicycle and no torque is produced when they are in the vertical position.
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Kirchoff's Laws. A circuit contains 3 known resistors, 2 known batteries, and 3 unknown currents as shown.
Assume the current flows through the circuit as shown (this is our initial guess, the actual currents may be
reverse). Use the sign convention that a potential drop is negative and a potential gain is positive.
E₂ = 8V
R₁₁ = 50
R₂ = 80
b
с
w
11
www
12
13
E₁ = 6V
R3 = 20
a) Apply Kirchoff's Loop Rule around loop abefa in the clockwise direction starting at point a. (2 pt).
b) Apply Kirchoff's Loop Rule around loop bcdeb in the clockwise direction starting at point b. (2 pt).
c) Apply Kirchoff's Junction Rule at junction b (1 pt).
d) Solve the above 3 equations for the unknown currents I1, 12, and 13 and specify the direction of the current
around each loop. (5 pts)
I1 =
A
12 =
A
13 =
A
Direction of current around loop abef
Direction of current around loop bcde
(CW or CCW)
(CW or CCW)
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Chapter 8 Solutions
Conceptual Physics / MasteringPhysics (Book & Access Card)
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. 16RCQCh. 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. 32RCQCh. 8 - Prob. 33RCQCh. 8 - Prob. 34RCQCh. 8 - Prob. 35RCQCh. 8 - Prob. 36RCQCh. 8 - Prob. 37RCQCh. 8 - Torque = lever arm ×...Ch. 8 - 39. Calculate the torque produced by the same 50-N...Ch. 8 - Prob. 40RCQCh. 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. 56RCQCh. 8 - Prob. 57RCQCh. 8 - Prob. 58RCQCh. 8 - 59. The wheels of railroad trains are tapered, a...Ch. 8 - Prob. 60RCQCh. 8 - 61. The front wheels of a racing vehicle are...Ch. 8 - 62. Which will have the greater acceleration...Ch. 8 - Prob. 63RCQCh. 8 - 64. Is the net torque changed when a partner on a...Ch. 8 - Prob. 65RCQCh. 8 - 66. When you pedal a bicycle, maximum torque is...Ch. 8 - Prob. 67RCQCh. 8 - Prob. 68RCQCh. 8 - Prob. 69RCQCh. 8 - Prob. 70RCQCh. 8 - 71. Explain why a long pole is more beneficial to...Ch. 8 - Prob. 72RCQCh. 8 - Prob. 73RCQCh. 8 - Prob. 74RCQCh. 8 - Prob. 75RCQCh. 8 - Prob. 76RCQCh. 8 - Prob. 77RCQCh. 8 - Prob. 78RCQCh. 8 - 79. The centers of gravity of the three trucks...Ch. 8 - Prob. 80RCQCh. 8 - Prob. 81RCQCh. 8 - Prob. 82RCQCh. 8 - 83. When you are in the front passenger seat of a...Ch. 8 - Prob. 84RCQCh. 8 - Prob. 85RCQCh. 8 - Prob. 86RCQCh. 8 - 87. The occupant inside a rotating space habitat...Ch. 8 - Prob. 88RCQCh. 8 - A motorcyclist is able to ride on the vertical...Ch. 8 - 90. The sketch shows a conical pendulum. The bob...Ch. 8 - Prob. 91RCQCh. 8 - Prob. 92RCQCh. 8 - Prob. 93RCQCh. 8 - 94. If all of Earth’s inhabitants moved to the...Ch. 8 - Prob. 95RCQCh. 8 - If the world’s populations moved to the North Pole...Ch. 8 - Prob. 97RCQCh. 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. 100RCQCh. 8 - Prob. 101RCQCh. 8 - Prob. 102RCQCh. 8 - Prob. 103RCQCh. 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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What is Torque? | Physics | Extraclass.com; Author: Extraclass Official;https://www.youtube.com/watch?v=zXxrAJld9mo;License: Standard YouTube License, CC-BY