Physics
5th Edition
ISBN: 9781260486919
Author: GIAMBATTISTA
Publisher: MCG
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Chapter 4, Problem 18MCQ
To determine
The frictional force offered by the surface of sidewalk on women standing at rest.
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A bungee jumper plans to bungee jump from a bridge 64.0 m above the ground. He plans to use a uniform elastic cord, tied to a harness around his body, to stop his fall at a point 6.00 m above the water. Model his body as a particle and the cord as having negligible mass and obeying
Hooke's law. In a preliminary test he finds that when hanging at rest from a 5.00 m length of the cord, his body weight stretches it by 1.55 m. He will drop from rest at the point where the top end of a longer section of the cord is attached to the bridge.
(a) What length of cord should he use?
Use subscripts 1 and 2 respectively to represent the 5.00 m test length and the actual jump length. Use Hooke's law F = KAL and the fact that the change in length AL for a given force is proportional the length L (AL = CL), to determine the force constant for the test case and for the
jump case. Use conservation of mechanical energy to determine the length of the rope. m
(b) What maximum acceleration will he…
9 V
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Figure 1: Circuit symbols for a variety of useful circuit elements
Problem 04.07 (17 points). Answer the following questions related to the figure below.
A What is the equivalent resistance of the network of resistors in the circuit below?
B If the battery has an EMF of 9V and is considered as an ideal batter (internal resistance
is zero), how much current flows through it in this circuit?
C If the 9V EMF battery has an internal resistance of 2 2, would this current be larger
or smaller? By how much?
D In the ideal battery case, calculate the current through and the voltage across each
resistor in the circuit.
help
Chapter 4 Solutions
Physics
Ch. 4.1 - CHECKPOINT 4.1A
Identify the forces acting on the...Ch. 4.1 - Prob. 4.1PPCh. 4.1 - Prob. 4.1BCPCh. 4.1 - Prob. 4.2PPCh. 4.2 - Prob. 4.3PPCh. 4.2 - Prob. 4.2CPCh. 4.2 - Prob. 4.4PPCh. 4.4 - Prob. 4.5PPCh. 4.4 - Prob. 4.4CPCh. 4.5 - Practice Problem 4.6 A Creative Defense
After an...
Ch. 4.5 - CHECKPOINT 4.5
If you climb Mt. McKinley, what...Ch. 4.5 - Practice Problem 4.7 Figs on the Moon
What would...Ch. 4.6 - CHECKPOINT 4.6
Your laptop is resting on the...Ch. 4.6 - Practice Problem 4.8 Chest at Rest
Suppose the...Ch. 4.6 - Practice Problem 4.9 Passing a Truck
A car is...Ch. 4.6 - Practice Problem 4.10 Smoothing the Infield...Ch. 4.7 - Practice Problem 4.11 Tightrope Practice Jorge...Ch. 4.7 - Practice Problem 4.12 System of Ropes, Pulleys,...Ch. 4.8 - Practice Problem 4.13 The Continuing Story …
How...Ch. 4.8 - Practice Problem 4.14 Coupling Force Between First...Ch. 4.8 - Practice Problem 4.15 Another Check
Using the...Ch. 4.8 - Practice Problem 4.16 Hauling the Crate with a...Ch. 4.8 - Practice Problem 4.17 Engine Thrust
What is the...Ch. 4.8 - Prob. 4.18PPCh. 4.8 - Prob. 4.8CPCh. 4.10 - Practice Problem 4.19 Elevator Descending
What is...Ch. 4.10 - Prob. 4.10CPCh. 4 - Prob. 1CQCh. 4 - Prob. 2CQCh. 4 - Prob. 4CQCh. 4 - Prob. 5CQCh. 4 - Prob. 6CQCh. 4 - Prob. 7CQCh. 4 - Prob. 8CQCh. 4 - Prob. 9CQCh. 4 - Prob. 10CQCh. 4 - Prob. 11CQCh. 4 - Prob. 12CQCh. 4 - Prob. 13CQCh. 4 - Prob. 14CQCh. 4 - 15. A heavy ball hangs from a string attached to a...Ch. 4 - 16. An SUV collides with a Mini Cooper...Ch. 4 - Prob. 17CQCh. 4 - Prob. 18CQCh. 4 - Prob. 19CQCh. 4 - Prob. 20CQCh. 4 - Prob. 21CQCh. 4 - Prob. 22CQCh. 4 - Prob. 23CQCh. 4 - 24. Pulleys and inclined planes are examples of...Ch. 4 - Prob. 25CQCh. 4 - Prob. 26CQCh. 4 - Prob. 27CQCh. 4 - Prob. 28CQCh. 4 - Prob. 29CQCh. 4 - Prob. 30CQCh. 4 - Prob. 31CQCh. 4 - Prob. 1MCQCh. 4 - Prob. 2MCQCh. 4 - Prob. 3MCQCh. 4 - Prob. 4MCQCh. 4 - Prob. 5MCQCh. 4 - Prob. 6MCQCh. 4 - Prob. 7MCQCh. 4 - Prob. 8MCQCh. 4 - Prob. 9MCQCh. 4 - Prob. 10MCQCh. 4 - Prob. 11MCQCh. 4 - Prob. 12MCQCh. 4 - Prob. 13MCQCh. 4 - Prob. 14MCQCh. 4 - Prob. 15MCQCh. 4 - Prob. 16MCQCh. 4 - Prob. 17MCQCh. 4 - Prob. 18MCQCh. 4 - Prob. 19MCQCh. 4 - Prob. 20MCQCh. 4 - Prob. 21MCQCh. 4 - Prob. 22MCQCh. 4 - Prob. 23MCQCh. 4 - Prob. 24MCQCh. 4 - Prob. 25MCQCh. 4 - Prob. 26MCQCh. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prob. 3PCh. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11PCh. 4 - Prob. 12PCh. 4 - Prob. 13PCh. 4 - Prob. 14PCh. 4 - Prob. 15PCh. 4 - 16. A truck driving on a level highway is acted on...Ch. 4 - 17. A tennis ball (mass 57.0 g) moves toward the...Ch. 4 - 18. A red-tailed hawk that weighs 8 N is gliding...Ch. 4 - 19. An 80 N crate of apples sits at rest on the...Ch. 4 - 20. Forces of magnitudes 2000 N and 3000 N act on...Ch. 4 - 21. A person stands on the ball of one foot. The...Ch. 4 - Prob. 21PCh. 4 - 22. A sailboat, tied to a mooring with a line,...Ch. 4 - 23. A hummingbird is hovering motionless beside a...Ch. 4 - 24. You are pulling a suitcase through the airport...Ch. 4 - Prob. 30PCh. 4 - 26. A man is lazily floating on an air mattress in...Ch. 4 - 27. What is the acceleration of an automobile of...Ch. 4 - 29. A large wooden crate is pushed along a...Ch. 4 - 28. A bag of potatoes with weight 39.2 N is...Ch. 4 - 30. A hanging plant is suspended by a cord from a...Ch. 4 - 31. A bike is hanging from a hook in a garage....Ch. 4 - 32. A woman who weighs 600 N sits on a chair with...Ch. 4 - 33. A fisherman is holding a fishing rod with a...Ch. 4 - Prob. 35PCh. 4 - Problems 35–37. A skydiver, who weighs 650 N, is...Ch. 4 - 36. (a) Identify the forces acting on the...Ch. 4 - 37. Consider the skydiver and parachute to be a...Ch. 4 - 38. Margie, who weighs 543 N, is standing on a...Ch. 4 - 39. (a) Calculate your weight in newtons. (b) What...Ch. 4 - 40. A young South African girl has a mass of 40.0...Ch. 4 - 41. A man weighs 0.80 kN on Earth. What is his...Ch. 4 - 42. The peak force on a runner’s foot during a...Ch. 4 - 43. In a binary star system, two stars orbit their...Ch. 4 - 44. An astronaut stands at a position on the Moon...Ch. 4 - 45. Find the ratio of the Earth’s gravitational...Ch. 4 - 46. How far above the surface of the Earth does an...Ch. 4 - 47. Find and compare the weight of a 65 kg man on...Ch. 4 - 48. Find the altitudes above the Earth’s surface...Ch. 4 - 49. During a balloon ascension, wearing an oxygen...Ch. 4 - 50. At what altitude above the Earth’s surface...Ch. 4 - 51. (a) What is the magnitude of the gravitational...Ch. 4 - 52. What is the approximate magnitude of the...Ch. 4 - 53. In free fall, we assume the acceleration to be...Ch. 4 - 54. A solar sailplane is going from Earth to Mars....Ch. 4 - Problems 55–57. Assume the elevator is supported...Ch. 4 - 56. While an elevator of mass 2530 kg moves...Ch. 4 - 57. While an elevator of mass 832 kg moves...Ch. 4 - 58. The vertical component of the acceleration of...Ch. 4 - Prob. 58PCh. 4 - 59. A man lifts a 2.0 kg stone vertically with his...Ch. 4 - 60. A man lifts a 2.0 kg stone vertically with his...Ch. 4 - Prob. 63PCh. 4 - 62. A binary star consists of two stars of masses...Ch. 4 - Prob. 65PCh. 4 - 65. A crate of artichokes is on a ramp that is...Ch. 4 - Prob. 66PCh. 4 - Prob. 68PCh. 4 - 67. An 85 kg skier is sliding down a ski slope at...Ch. 4 - 68. A book that weighs 10 N is at rest in six...Ch. 4 - 69. Strategy While the crate is remaining at rest,...Ch. 4 - Problems 69–72. A crate of potatoes of mass 18.0...Ch. 4 - Problems 69–72. A crate of potatoes of mass 18.0...Ch. 4 - Problems 69–72. A crate of potatoes of mass 18.0...Ch. 4 - 73. (a) In Example 4.10, if the movers stop...Ch. 4 - 74. A 3.0 kg block is at rest on a horizontal...Ch. 4 - 75. A horse is trotting along pulling a sleigh...Ch. 4 - 76. Before hanging new William Morris wallpaper in...Ch. 4 - 78. A box sits on a horizontal wooden ramp. The...Ch. 4 - 79. In a playground, two slides have different...Ch. 4 - 81. A towline is attached between a car and a...Ch. 4 - 82. In Example 4.14, find the tension in the...Ch. 4 - 83. A 200.0 N sign is suspended from a horizontal...Ch. 4 - 84. Strategy Use Newton’s first law of motion. The...Ch. 4 - 85. A pulley is attached to the ceiling. Spring...Ch. 4 - 86. Spring scale A is attached to the floor and a...Ch. 4 - 87. Two springs are connected in series so that...Ch. 4 - 88. A pulley is hung from the ceiling by a rope. A...Ch. 4 - 89. A 2.0 kg ball tied to a string fixed to the...Ch. 4 - Prob. 90PCh. 4 - 91. A 45 N lithograph is supported by two wires....Ch. 4 - 92. A crow perches on a clothesline midway between...Ch. 4 - 93. The drawing shows a wire attached to two back...Ch. 4 - Prob. 94PCh. 4 - 95. Two blocks, masses m1 and m2, are connected by...Ch. 4 - 96. The coefficient of static friction between a...Ch. 4 - 97. A 2.0 kg toy locomotive is pulling a 1.0 kg...Ch. 4 - 98. An engine pulls a train of 20 freight cars,...Ch. 4 - Prob. 99PCh. 4 - A horizontal rope is attached from a truck to a...Ch. 4 - 101. An accelerometer—a device to measure...Ch. 4 - 102. A box full of books rests on a wooden floor....Ch. 4 - 103. A helicopter is lifting two crates...Ch. 4 - 104. A person stands on a bathroom scale in an...Ch. 4 - 105. Oliver has a mass of 76.2 kg. He is riding in...Ch. 4 - Prob. 106PCh. 4 - Prob. 107PCh. 4 - Prob. 108PCh. 4 - Prob. 109PCh. 4 - 110. Yolanda, whose mass is 64.2 kg, is riding in...Ch. 4 - Prob. 111PCh. 4 - Prob. 112PCh. 4 - Prob. 32CQCh. 4 - Prob. 33CQCh. 4 - Prob. 34CQCh. 4 - Prob. 35CQCh. 4 - Prob. 36CQCh. 4 - Prob. 114PCh. 4 - Prob. 116PCh. 4 - Prob. 117PCh. 4 - Prob. 113PCh. 4 - Prob. 3CQCh. 4 - Prob. 115PCh. 4 - Prob. 118PCh. 4 - Prob. 119PCh. 4 - Prob. 120PCh. 4 - Prob. 121PCh. 4 - Prob. 122PCh. 4 - Prob. 123PCh. 4 - Prob. 124PCh. 4 - Prob. 125PCh. 4 - Prob. 126PCh. 4 - Prob. 127PCh. 4 - 134. The tallest spot on Earth is Mt. Everest,...Ch. 4 - Prob. 129PCh. 4 - Prob. 130PCh. 4 - Prob. 131PCh. 4 - Prob. 132PCh. 4 - Prob. 133PCh. 4 - Prob. 134PCh. 4 - Prob. 135PCh. 4 - Prob. 136PCh. 4 - Prob. 137PCh. 4 - Prob. 138PCh. 4 - Prob. 139PCh. 4 - Prob. 140PCh. 4 - Prob. 141PCh. 4 - Prob. 142PCh. 4 - Prob. 143PCh. 4 - Prob. 144PCh. 4 - Prob. 145PCh. 4 - Prob. 146PCh. 4 - Prob. 147PCh. 4 - Prob. 148PCh. 4 - 155. You want to lift a heavy box with a mass of...Ch. 4 - 156. A crate of oranges weighing 180 N rests on a...Ch. 4 - Prob. 151PCh. 4 - Prob. 152PCh. 4 - 159. A helicopter of mass M is lowering a truck of...Ch. 4 - Prob. 154PCh. 4 - Prob. 155PCh. 4 - Prob. 156PCh. 4 - Prob. 157PCh. 4 - 164. A person is doing leg lifts with 3.00 kg...Ch. 4 - Prob. 159PCh. 4 - Prob. 160PCh. 4 - Prob. 161PCh. 4 - Prob. 162PCh. 4 - Prob. 164PCh. 4 - Prob. 163PCh. 4 - Prob. 170PCh. 4 - Prob. 165PCh. 4 - Prob. 166PCh. 4 - Prob. 171PCh. 4 - Prob. 167PCh. 4 - Prob. 172PCh. 4 - Prob. 173PCh. 4 - You are designing a high-speed elevator for a new...Ch. 4 - Prob. 175PCh. 4 - Prob. 176PCh. 4 - Prob. 168PCh. 4 - Prob. 169P
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