College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 7, Problem 80GP
Bungee jump. A bungee cord is 30.0 m long and, when stretched a distance x, it exerts a restoring force of magnitude kx. Your father-in-law (mass 95.0 kg) stands on a platform 45.0 m above the ground, and one end of the cord is tied securely to his ankle and the other end to the platform. You have promised him that when he steps off the platform he will fall a maximum distance of only 41.0 m before the cord stops him. You had several bungee cords to select from, and you tested them by stretching them out, tying one end to a tree, and pulling on the other end with a force of 380.0 N. When you do this, what distance will the bungee cord that you should select have stretched?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A 32.0-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 225 N. For the first 11.0 mm the floor is frictionless, and for the next 10.0 mm the coefficient of friction is 0.20.
What is the final speed of the crate after being pulled these 21.0 mm?
Express your answer to three significant figures and include the appropriate units.
The spring force is initially greater than friction, so the block accelerates forward. But eventually the spring force decreases enough so that it is le
(decelerates).
In a physics lab experiment, one end of a horizontal spring that obeys Hooked's law is
attached to a wall. The spring is compressed æo = 0.400 m, and a block with mass
0.300 kg is attached to
horizontal surface. Electronic sensors measure the speed v of the block after it has
traveled a distance d from its initial position against the compressed spring. The measured
The spring is then released, and the block moves along a
O The spring force is always less than friction, so the block decelerates all the time.
values are listed in the table below.
Submit
Previous Answers
d (m) v (m/s)
v Correct
0.05
0.85
0.10
1.11
Part B
0.15
1.24
0.25
1.26
Use the work-energy theorem to derive an expression for v? in terms of d. Do not substitute the value of æo into the expression.
0.30
1.14
0.35 0.90
Express your answer in terms of some…
You give a crate of mass m = 1.00 kg an initial speed of vi = 4.00 m/s up an incline of θ = 17°. The crate then slides along the incline, reaches a spring of spring constant k = 92 N/m , and compresses the spring by Δs = 15.0 cm before stopping.
a) what is the distance d, in meters, along the incline that the crate slides, assuming there is no friction?
b)What distance ds, in meters, along the incline had the crate moved when it just touched the spring?
c)If there were friction between the crate and incline, what coefficient of kinetic friction would stop the crate after it travels ds (just before it compresses the spring)?
Chapter 7 Solutions
College Physics (10th Edition)
Ch. 7 - A box is pushed across a rough horizontal surface...Ch. 7 - Can the total work done on an object during a...Ch. 7 - True or false? If hydrogen molecules and oxygen...Ch. 7 - An elevator is hoisted by its cables at constant...Ch. 7 - A satellite moves in a circular orbit at a...Ch. 7 - If a projectile is fired upward at various angles...Ch. 7 - A block is initially traveling at a speed vc at...Ch. 7 - An advertisment for a portable electrical a...Ch. 7 - A child can slide down any of the three slides...Ch. 7 - Hydroelectric energy comes from gravity pulling...
Ch. 7 - Does the kinetic energy of a car change more when...Ch. 7 - When you jump from the ground into the air, where...Ch. 7 - Two unequal masses are connected by a massless...Ch. 7 - On your electric bill, you are charged for...Ch. 7 - In Figure 7.42, two blocks with masses mA and mB,...Ch. 7 - A car is initially traveling at a speed of v0....Ch. 7 - A spiral spring is compressed so as to add U units...Ch. 7 - You slam on the brakes of your car in a panic and...Ch. 7 - Consider two frictionless inclined planes with the...Ch. 7 - A brick is dropped from the top of a building...Ch. 7 - Prob. 5MCPCh. 7 - Two identical objects are pressed against two...Ch. 7 - For each of two objects with different masses, the...Ch. 7 - Two objects with unequal masses are released from...Ch. 7 - Spring #1 has a force constant of k, and spring #2...Ch. 7 - Two balls having different masses reach the same...Ch. 7 - A fisherman reels in 12.0 m of line while landing...Ch. 7 - A tennis player hits a 58.0 g tennis ball so that...Ch. 7 - A boat with a horizontal tow rope pulls a water...Ch. 7 - A constant horizontal pull of 8.50 N drags a box...Ch. 7 - A rope is tied to a box and used to pull the box...Ch. 7 - A 128.0 N carton is pulled up a frictionless...Ch. 7 - A factory worker moves a 30.0 kg crate a distance...Ch. 7 - An 8.00 kg package in a mail-sorting room slides...Ch. 7 - A tow truck pulls a car 5.00 km along a horizontal...Ch. 7 - A 60 kg woman steps onto an up-going escalator,...Ch. 7 - A bullet is fired into a large stationary absorber...Ch. 7 - Animal energy. Adult cheetahs, the fastest of the...Ch. 7 - A 0.145 kg baseball leaves a pitchers hand at a...Ch. 7 - A 1.50 kg book is sliding along a rough horizontal...Ch. 7 - Stopping distance of a car. The driver of an 1800...Ch. 7 - You throw a 20 N rock into the air from ground...Ch. 7 - Fleas are agile, wingless insects that feed on the...Ch. 7 - A 61 kg skier on level snow coasts 184 m to a stop...Ch. 7 - A block of ice with mass 2.00 kg slides 0.750 m...Ch. 7 - To stretch a certain spring by 2.5 cm from its...Ch. 7 - A spring is 17.0 cm long when it is lying on a...Ch. 7 - A spring with spring constant 100 N/m and...Ch. 7 - The graph in Figure 7.440 shows the magnitude of...Ch. 7 - A 575 N woman climbs a staircase that rises at 53...Ch. 7 - How high can we jump? The maximum height a typical...Ch. 7 - A 72.0 kg swimmer jumps into the old swimming hole...Ch. 7 - A 2.50 kg mass is pushed against a horizontal...Ch. 7 - A force of magnitude 800.0 N stretches a certain...Ch. 7 - Tendons. Tendons are strong elastic fibers that...Ch. 7 - A certain spring stores 10.0 J of potential energy...Ch. 7 - A 0.5 kg ball is thrown up into the air with an...Ch. 7 - Food calories. The food calorie, equal to 4186 J,...Ch. 7 - A good workout. You overindulged in a delicious...Ch. 7 - An exercise program. A 75 kg person is put on an...Ch. 7 - Tall Pacific Coast redwood trees (Sequoia...Ch. 7 - The total height of Yosemite Falls is 2425 ft. (a)...Ch. 7 - The speed of hailstones. Although the altitude may...Ch. 7 - Prob. 38PCh. 7 - Volcanoes on lo. lo, a satellite of Jupiter, is...Ch. 7 - Human energy vs. insect energy. For its size, the...Ch. 7 - A 25 kg child plays on a swing having support...Ch. 7 - A slingshot obeying Hookes law is used to launch...Ch. 7 - A spring with spring constant k is anchored to the...Ch. 7 - A 1.5 kg box moves back and forth on a horizontal...Ch. 7 - A 12.0 N package of whole wheat flour is suddenly...Ch. 7 - A spring of negligible mass has force constant k =...Ch. 7 - A 1.50 kg brick is sliding along on a rough...Ch. 7 - A fun-loving 11.4 kg otter slides up a hill and...Ch. 7 - A 12.0 g plastic ball is dropped from a height of...Ch. 7 - You are rearranging the furniture in your living...Ch. 7 - While a roofer is working on a roof that slants at...Ch. 7 - A block with mass 0.50 kg is forced against a...Ch. 7 - A loaded 375 kg toboggan is traveling on smooth...Ch. 7 - A 62.0 kg skier is moving at 6.50 m/s on a...Ch. 7 - Suppose you were to drop a 14 lb bowling ball from...Ch. 7 - The engine of a motorboat delivers 30.0 kW to the...Ch. 7 - Prob. 57PCh. 7 - A tandem (two-person) bicycle team must overcome a...Ch. 7 - An elevator has mass 600 kg, not including...Ch. 7 - U.S. power use. The total consumption of...Ch. 7 - Solar energy. The sun transfers energy to the...Ch. 7 - A 20.0 kg box is pulled along a rough horizontal...Ch. 7 - A typical flying insect applies an average force...Ch. 7 - When its 75 kW (100 hp) engine is generating full...Ch. 7 - The power of the human heart. The human heart is a...Ch. 7 - At the site of a wind farm in North Dakota, the...Ch. 7 - A physics student measures the energy stored in a...Ch. 7 - Human terminal velocity. By landing properly and...Ch. 7 - A wooden rod of negligible mass and length 80.0 cm...Ch. 7 - Ski jump ramp. You are designing a ski jump ramp...Ch. 7 - Rescue. Your friend (mass 65.0 kg) is standing on...Ch. 7 - On an essentially frictionless horizontal...Ch. 7 - Pendulum. A small 0.12 kg metal ball is tied to a...Ch. 7 - A pump is required to lift 750 liters of water per...Ch. 7 - A 350 kg roller coaster starts from rest at point...Ch. 7 - In action movies there are often chase scenes in...Ch. 7 - In creating his definition of horsepower, James...Ch. 7 - All birds, independent of their size, must...Ch. 7 - A 250 g object on a frictionless, horizontal lab...Ch. 7 - Bungee jump. A bungee cord is 30.0 m long and,...Ch. 7 - Riding a loop-the-loop. A car in an amusement park...Ch. 7 - A 2.0 kg piece of wood slides on the surface shown...Ch. 7 - A 68 kg skier approaches the foot of a hill with a...Ch. 7 - Energy requirements of the body. A 70 kg human...Ch. 7 - The aircraft carrier USS George Washington has...Ch. 7 - A ball is thrown upward with an initial velocity...Ch. 7 - Automotive power. A truck engine transmits 28.0 kW...Ch. 7 - Prob. 88PPCh. 7 - Prob. 89PPCh. 7 - How many times greater is the kinetic energy of...Ch. 7 - During the calibration process, the cantilever is...Ch. 7 - A segment of DNA is put in place and stretched....Ch. 7 - Based on Figure 7.52, how much elastic potential...Ch. 7 - The stage moves at a constant speed while...
Additional Science Textbook Solutions
Find more solutions based on key concepts
1. When is energy most evident?
Conceptual Physics (12th Edition)
2. The three ropes in FIGURE EX6.2 are tied to a small, very light ring. Two of the ropes are anchored to wa...
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Which of the three orbits shown below (A, B, or C) would you say most closely matches the shape of Earth's orbi...
Lecture- Tutorials for Introductory Astronomy
(II) Light of wavelength λ passes through a pair of slits separated by 0.17 mm, forming a double-slit interfere...
Physics for Scientists and Engineers with Modern Physics
How does the weight of falling body cmpare with the air resistance it encounters just before it reaches the ter...
Conceptual Integrated Science
Specific heat of a metal.
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- The system shown in Figure P5.43 is used to lift an object of mass m = 76.0 kg. A constant downward force of magnitude F is applied to the loose end of the rope such that the hanging object moves upward at constant speed. Neglecting the masses of the rope and pulleys, find (a) the required value of F, (b) the tensions T1, T2, and T3, and (c) the work done by the applied force in raising the object a distance of 1.80 m. Figure P5.43arrow_forwardWhy is the following situation impossible? In a new casino, a supersized pinball machine is introduced. Casino advertising boasts that a professional basketball player can lie on top of the machine and his head and feet will not hang off the edge! The ball launcher in the machine sends metal balls up one side of the machine and then into play. The spring in the launcher (Fig. P6.60) has a force constant of 1.20 N/cm. The surface on which the ball moves is inclined = 10.0 with respect to the horizontal. The spring is initially compressed its maximum distance d = 5.00 cm. A ball of mass 100 g is projected into play by releasing the plunger. Casino visitors find the play of the giant machine quite exciting.arrow_forwardA 1.00-kg object slides to the right on a surface having a coefficient of kinetic friction 0.250 (Fig. P7.68a). The object has a speed of vi = 3.00 m/s when it makes contact with a light spring (Fig. P7.68b) that has a force constant of 50.0 N/m. The object comes to rest after the spring has been compressed a distance d (Fig. P7.68c). The object is then forced toward the left by the spring (Fig. P7.68d) and continues to move in that direction beyond the springs unstretched position. Finally, the object comes to rest a distance D to the left of the unstretched spring (Fig. P7.68e). Find (a) the distance of compression d, (b) the speed v at the unstretched position when the object is moving to the left (Fig. P7.68d), and (c) the distance D where the object comes to rest. Figure P7.68arrow_forward
- At 220 m, the bungee jump at the Verzasca Dam in Locarno, Switzerland, is one of the highest jumps on record. The length of the elastic cord, which can be modeled as having negligible mass and obeying Hookes law, has to be precisely tailored to each jumper because the margin of error at the bottom of the dam is less than 10.0 m. Kristin prepares for her jump by first hanging at rest from a 10.0-m length of the cord and is observed to stretch the rope to a total length of 12.5 m. a. What length of cord should Kristin use for her jump to be exactly 220 m? b. What is the maximum acceleration she will experience during her jump?arrow_forwardA block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless, horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle = 25.0 below the horizontal as shown in Figure P6.3. Determine the work done on the block by (a) the applied force, (b) the normal force exerted by the table, (c) the gravitational force, and (d) the net force on the block. Figure P6.3arrow_forwardA certain automobile engine delivers 2.24 104 W (30.0 hp) to its wheels when moving at a constant speed of 27.0 m/s ( 60 mi/h). What is the resistive force acting on the automobile at that speed?arrow_forward
- A block of mass 0.500 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x (Fig. P7.79). The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to point , the bottom of a vertical circular track of radius R = 1.00 m, and continues to move up the track. The blocks speed at the bottom of the track is = 12.0 m/s, and the block experiences an average friction force of 7.00 N while sliding up the track. (a) What is x? (b) If the block were to reach the top of the track, what would be its speed at that point? (c) Does the block actually reach the top of the track, or does it fall off before reaching the top?arrow_forwardA block is placed on top of a vertical spring, and the spring compresses. Figure P8.24 depicts a moment in time when the spring is compressed by an amount h. a. To calculate the change in the gravitational and elastic potential energies, what must be included in the system? b. Find an expression for the change in the systems potential energy in terms of the parameters shown in Figure P8.24. c. If m = 0.865 kg and k = 125 N/m, find the change in the systems potential energy when the blocks displacement is h = 0.0650 m, relative to its initial position. FIGURE P8.24arrow_forwardA block of mass 165 grams is placed on top of a light vertical spring, which is compressed by 7.25 cm. When the block is released from rest, it travels upward and leaves the spring to a maximum height of 14.4 m. What is the force constant of the spring?arrow_forward
- A box weighing 3.9 kg is initially at rest on a horizontal floor. It is then pushed in a straight line for 1.2 m by a girl exerting a horizontal force with a magnitude 36 N. What is the final speed of the box if there if no friction between the floor and the box? What is the final speed if a coeffient 0.30 would be introduced between the floor and the box?arrow_forwardYou place a book of mass 4.00 kg against a vertical wall. You apply a constant force F⃗ to the book, where F = 99.0 N and the force is at angle of 60.0∘ above the horizontal (Figure 1). The coefficient of kinetic friction between the book and the wall is 0.300. If the book is initially at rest, what is its speed after it has traveled 0.400 m up the wall.arrow_forwardYou are a member of an alpine rescue team and must get a box of supplies, with mass 2.20 kg , up an incline of constant slope angle 30.0 so that it reaches a stranded skier who is a vertical distance 3.10 m above the bottom of the incline. There is some friction present; the kinetic coefficient of friction is 6.00×10−2. Since you can't walk up the incline, you give the box a push that gives it an initial velocity; then the box slides up the incline, slowing down under the forces of friction and gravity. Take acceleration due to gravity to be 9.81 m/s2 . Use the work-energy theorem to calculate the minimum speed v that you must give the box at the bottom of the incline so that it will reach the skier. Express your answer numerically, in meters per second.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Classical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Classical Dynamics of Particles and Systems
Physics
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
SIMPLE HARMONIC MOTION (Physics Animation); Author: EarthPen;https://www.youtube.com/watch?v=XjkUcJkGd3Y;License: Standard YouTube License, CC-BY