Physics
10th Edition
ISBN: 9781118486894
Author: David Young, Shane Stadler
Publisher: WILEY
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Chapter 4, Problem 57P
To determine
The mass of the worker.
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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
300 Ω
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100 Ω 200 Ω
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400 Ω
500 Ω
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600 Ω
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700 Ω
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. 4.2 - Prob. 1CYUCh. 4.3 - 2. The net external force acting on an object is...Ch. 4.3 - Prob. 3CYUCh. 4.4 - 4. Newton’s second law indicates that when a net...Ch. 4.4 - 5. All of the following, except one, cause the...Ch. 4.5 - Prob. 6CYUCh. 4.7 - Prob. 7CYUCh. 4.7 - Prob. 8CYUCh. 4.7 - Prob. 9CYUCh. 4.7 - Prob. 10CYU
Ch. 4.8 - Prob. 11CYUCh. 4.8 - Prob. 12CYUCh. 4.8 - Prob. 13CYUCh. 4.9 - 14. Suppose that the coefficients of static and...Ch. 4.9 - Prob. 15CYUCh. 4.9 - Prob. 16CYUCh. 4.9 - Prob. 17CYUCh. 4.10 - Prob. 18CYUCh. 4.11 - Prob. 19CYUCh. 4.11 - Prob. 20CYUCh. 4.11 - Prob. 21CYUCh. 4.11 - Prob. 22CYUCh. 4.12 - Prob. 23CYUCh. 4.12 - 24. A freight train is accelerating on a level...Ch. 4 - Prob. 1FCCh. 4 - 3. A cup of coffee is sitting on a table in a...Ch. 4 - 5. Two forces act on a moving object that has a...Ch. 4 - Prob. 7FCCh. 4 - 8. Two ice skaters, Paul and Tom, are each holding...Ch. 4 - 9. In another solar system a planet has twice the...Ch. 4 - Prob. 11FCCh. 4 - 12. The apparent weight of a passenger in an...Ch. 4 - Prob. 13FCCh. 4 - Prob. 15FCCh. 4 - Prob. 16FCCh. 4 - Prob. 18FCCh. 4 - Prob. 20FCCh. 4 - Prob. 23FCCh. 4 - Prob. 25FCCh. 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 - Prob. 16PCh. 4 - Prob. 17PCh. 4 - Prob. 18PCh. 4 - Prob. 19PCh. 4 - Prob. 20PCh. 4 - Prob. 21PCh. 4 - Prob. 22PCh. 4 - Prob. 23PCh. 4 - Prob. 24PCh. 4 - 25. A bowling ball (mass = 7.2 kg, radius = 0.11...Ch. 4 - Prob. 26PCh. 4 - Prob. 27PCh. 4 - Prob. 28PCh. 4 - Prob. 29PCh. 4 - Prob. 30PCh. 4 - Prob. 31PCh. 4 - Prob. 32PCh. 4 - Prob. 33PCh. 4 - Prob. 34PCh. 4 - *35. The sun is more massive than the moon, but...Ch. 4 - Prob. 36PCh. 4 - Prob. 37PCh. 4 - Prob. 38PCh. 4 - Prob. 39PCh. 4 - Prob. 40PCh. 4 - 41. A car is traveling up a hill that is inclined...Ch. 4 - Prob. 42PCh. 4 - Prob. 43PCh. 4 - Prob. 44PCh. 4 - Prob. 45PCh. 4 - Prob. 46PCh. 4 - 47. An 81-kg baseball player slides into second...Ch. 4 - Prob. 48PCh. 4 - Prob. 49PCh. 4 - Prob. 50PCh. 4 - Prob. 51PCh. 4 - Prob. 52PCh. 4 - Prob. 53PCh. 4 - Prob. 54PCh. 4 - Prob. 55PCh. 4 - Prob. 56PCh. 4 - Prob. 57PCh. 4 - Prob. 58PCh. 4 - Prob. 59PCh. 4 - 60. The drawing shows a circus clown who weighs...Ch. 4 - Prob. 61PCh. 4 - Prob. 62PCh. 4 - *63. A 44-kg chandelier is suspended 1.5 m below a...Ch. 4 - Prob. 64PCh. 4 - Prob. 65PCh. 4 - Prob. 66PCh. 4 - Prob. 67PCh. 4 - **68. A kite is hovering over the ground at the...Ch. 4 - Prob. 69PCh. 4 - Prob. 70PCh. 4 - Prob. 71PCh. 4 - Prob. 72PCh. 4 - Prob. 73PCh. 4 - Prob. 74PCh. 4 - Prob. 75PCh. 4 - Prob. 76PCh. 4 - 77. A car is towing a boat on a trailer. The...Ch. 4 - Prob. 78PCh. 4 - Prob. 79PCh. 4 - Prob. 80PCh. 4 - Prob. 81PCh. 4 - Prob. 82PCh. 4 - Prob. 83PCh. 4 - *84. A train consists of 50 cars, each of which...Ch. 4 - Prob. 85PCh. 4 - *86. The drawing shows a large cube (mass = 25 kg)...Ch. 4 - Prob. 87PCh. 4 - Prob. 88PCh. 4 - Prob. 89PCh. 4 - Prob. 90PCh. 4 - Prob. 91PCh. 4 - Prob. 92PCh. 4 - Prob. 93PCh. 4 - **94. A 5.00-kg block is placed on top of a...Ch. 4 - Prob. 95APCh. 4 - Prob. 96APCh. 4 - Prob. 97APCh. 4 - Prob. 98APCh. 4 - Prob. 99APCh. 4 - Prob. 100APCh. 4 - Prob. 101APCh. 4 - Prob. 102APCh. 4 - Prob. 103APCh. 4 - Prob. 104APCh. 4 - Prob. 105APCh. 4 - Prob. 106APCh. 4 - Prob. 107APCh. 4 - Prob. 108APCh. 4 - Prob. 110APCh. 4 - Prob. 112APCh. 4 - Prob. 113APCh. 4 - Prob. 114APCh. 4 - Prob. 115APCh. 4 - Prob. 116APCh. 4 - Prob. 117APCh. 4 - Prob. 118APCh. 4 - Prob. 119APCh. 4 - Prob. 120AP
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- If the block does reach point B, how far up the curved portion of the track does it reach, and if it does not, how far short of point B does the block come to a stop? (Enter your answer in m.)arrow_forwardTruck suspensions often have "helper springs" that engage at high loads. One such arrangement is a leaf spring with a helper coil spring mounted on the axle, as shown in the figure below. When the main leaf spring is compressed by distance yo, the helper spring engages and then helps to support any additional load. Suppose the leaf spring constant is 5.05 × 105 N/m, the helper spring constant is 3.50 × 105 N/m, and y = 0.500 m. Truck body yo Main leaf spring -"Helper" spring Axle (a) What is the compression of the leaf spring for a load of 6.00 × 105 N? Your response differs from the correct answer by more than 10%. Double check your calculations. m (b) How much work is done in compressing the springs? ☑ Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. Jarrow_forwardA spring is attached to an inclined plane as shown in the figure. A block of mass m = 2.71 kg is placed on the incline at a distance d = 0.285 m along the incline from the end of the spring. The block is given a quick shove and moves down the incline with an initial speed v = 0.750 m/s. The incline angle is = 20.0°, the spring constant is k = 505 N/m, and we can assume the surface is frictionless. By what distance (in m) is the spring compressed when the block momentarily comes to rest? m m 0 k wwwwarrow_forward
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