Physics for Scientists and Engineers with Modern Physics
4th Edition
ISBN: 9780131495081
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 4, Problem 71GP
A city planner is working on the redesign of a hilly portion of a city. An important consideration is how steep the roads can be so that even low-powered cars can get up the hills without slowing down. A particular small car. with a mass of 920 kg. can accelerate on a level road from rest to 21 m/s (75 km/h) in 12.5 s. Using these data, calculate the maximum steepness of a hill.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
2. A crate is given an initial speed of 3.0 m/s up a 25° inclined plane. Assume uk = 0.17.
(a) What is the acceleration of the crate as it goes up the incline?
(b) How far up the plane will it go?
(c) What is the acceleration of the crate as it goes down the incline?
(d) What is the crate's speed when it gets to the bottom of the incline?
(e) In this problem we assumed that after reaching its highest point the crate be-
gan to slide backdown. Given that this happens, what can you say about the
coefficient of static friction?
20
Problem 3: An object is thrown straight down from the top of a building that is 32 m high. The object's initial
velocity is 22 m/s.
What is its speed when it reaches the ground in m/s?
Numeric : A numeric value is expected and not an expression.
V =
Chapter 4 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 4.4 - Suppose you watch a cup slide on the (smooth)...Ch. 4.5 - Return to the first Chapter-Opening Question, page...Ch. 4.5 - A massive truck collides head-on with a small...Ch. 4.5 - If you push on a heavy desk, does it always push...Ch. 4.7 - A 10.0-kg box is dragged on a horizontal...Ch. 4 - Why does a child in a wagon seem to fall backward...Ch. 4 - A box rests on the (frictionless) bed of a truck....Ch. 4 - If the acceleration of an object is zero, are no...Ch. 4 - If an object is moving, is it possible for the net...Ch. 4 - Only one force acts on an object. Can the object...
Ch. 4 - When a golf ball is dropped to the pavement, it...Ch. 4 - If you walk along a log floating on a lake, why...Ch. 4 - Why might your foot hurt if you kick a heavy desk...Ch. 4 - When you are running and want to slop quickly, you...Ch. 4 - (a) Why do you push down harder on the pedals of a...Ch. 4 - A father and his young daughter are ice skating....Ch. 4 - Suppose that you are standing on a cardboard...Ch. 4 - A stone hangs by a fine thread from the ceiling,...Ch. 4 - The force of gravity on a 2-kg rock is twice as...Ch. 4 - Would a spring scale carried to the Moon give...Ch. 4 - You pull a box with a constant force across a...Ch. 4 - When an object falls freely under the influence of...Ch. 4 - Compare the effort (or force) needed to lift a...Ch. 4 - Which of the following objects weighs about 1 N:...Ch. 4 - According to Newtons third law. each team in a tug...Ch. 4 - When you stand still on the ground, how large a...Ch. 4 - Whiplash sometimes results from an automobile...Ch. 4 - Mary exerts an upward force of 40N to hold a bag...Ch. 4 - A bear sling, Fig. 430, in used in some national...Ch. 4 - (I) What force is needed to accelerate a child on...Ch. 4 - (1) A net force of 265N accelerates a bike and...Ch. 4 - (I) What is the weight of a 68-kg astronaut (a) on...Ch. 4 - (I) How much tension must a rope withstand if it...Ch. 4 - (II) Superman must stop a 120-km/h train in 150 m...Ch. 4 - (II) What average force is required to stop a...Ch. 4 - (II) Estimate the average force exerted by a...Ch. 4 - (II) A 0.140-kg baseball traveling 35.0 m/s...Ch. 4 - (II) A fisherman yanks a fish vertically out of...Ch. 4 - (II) A 20.0-kg box rests on a table. (a) What is...Ch. 4 - (II) What average force is needed to accelerate a...Ch. 4 - (II) How much tension must a cable withstand if it...Ch. 4 - (II) A 14.0-kg bucket is lowered vertically by a...Ch. 4 - (II) A particular race car can cover a...Ch. 4 - (II) A 75-kg petty thief wants to escape from a...Ch. 4 - (II) An elevator (mass 4850 kg) is to he designed...Ch. 4 - (II) Can cars stop on a dime? Calculate the...Ch. 4 - (II) A person stands on a bathroom scale in a...Ch. 4 - (II) High-speed elevators function under two...Ch. 4 - (II) Using focused laser light, optical tweezers...Ch. 4 - (II) A rocket with a mass of 2.75 106 kg exerts a...Ch. 4 - (II) (a) What is the acceleration of two falling...Ch. 4 - (II) An exceptional standing jump would raise a...Ch. 4 - (II) The cable supporting a 2125-kg elevator has a...Ch. 4 - (III) The 100-m dash can be run by the best...Ch. 4 - (III) A person jumps from the roof of a house...Ch. 4 - (I) A box weighing 77.0 N rests on atable. A rope...Ch. 4 - (I) Draw the free-body diagram for a basketball...Ch. 4 - (I) Sketch the tree body diagram of a baseball (a)...Ch. 4 - (I) A 650-N force acts in a northwesterly...Ch. 4 - (II) Christian is making a Tyrolean traverse as...Ch. 4 - (II) A window washer pulls herself upward using...Ch. 4 - (II) One 3.2-kg paint bucket is hanging by a...Ch. 4 - (II) The cords accelerating the buckets in Problem...Ch. 4 - (II) Two snowcats in Antarctica are towing a...Ch. 4 - (II) A train locomotive is pulling two cars of the...Ch. 4 - (II) The two forces F1 and F2 shown in Fig. 4-40a...Ch. 4 - (II) At the instant a race began, a 65-kg sprinter...Ch. 4 - (II) A mass m is at rest on a horizontal...Ch. 4 - Prob. 40PCh. 4 - (II) Uphill escape ramps are sometimes provided to...Ch. 4 - (II) A child on a sled reaches the bottom of a...Ch. 4 - (II) A skateboarder, with an initial speed of...Ch. 4 - (II) As shown in Fig. 4-41, five balls (masses...Ch. 4 - (II) A 27-kg chandelier hangs from a ceiling on a...Ch. 4 - (II) Three blocks on a frictionless horizontal...Ch. 4 - (II) Redo Example 413 but (a) set up the equations...Ch. 4 - (II) The block shown in Fig. 4-43 has mass m = 7.0...Ch. 4 - (II) A block is given an initial speed of 4.5 m/s...Ch. 4 - (II) An object is hanging by a string from your...Ch. 4 - (II) Figure 4-45 shows a block (mass mA) on a...Ch. 4 - (II) (a) If mA = 13.0 kg and mB = 5.0 kg in Fig....Ch. 4 - (III) Determine a formula for the acceleration of...Ch. 4 - (III) Suppose the pulley in Fig. 446 is suspended...Ch. 4 - (III) A small block of mass m rests on the sloping...Ch. 4 - (III) The double Atwood machine shown in Fig. 4-48...Ch. 4 - (III) Suppose two boxes on a frictionless table...Ch. 4 - (III) The two masses shown in Fig, 450 are each...Ch. 4 - (III) Determine a formula for the magnitude of the...Ch. 4 - (III) A particle of mass m, initially at rest at x...Ch. 4 - (III) A heavy steel cable of length and mass M...Ch. 4 - A person has a reasonable chance of surviving an...Ch. 4 - A 2.0-kg purse is dropped 58 m from the top of the...Ch. 4 - Toms hang glider supports his weight using the six...Ch. 4 - A wet bar of soap (m = 150 g) slides freely down a...Ch. 4 - A cranes trolley at point P in Fig. 4-53 moves for...Ch. 4 - A block (mass mA) lying on a fixed frictionless...Ch. 4 - (a) In Fig. 454, if mA = mB = 1.00 kg and 33.0,...Ch. 4 - The masses mA and mB slide on the smooth...Ch. 4 - A 75.0-kg person stands on a scale in an elevator....Ch. 4 - A city planner is working on the redesign of a...Ch. 4 - If a bicyclist of mass 65 kg (including the...Ch. 4 - A bicyclist can coast down a 5.0 hill at a...Ch. 4 - Francesca dangles her watch from a thin piece of...Ch. 4 - (a) What minimum force F is needed to lift the...Ch. 4 - In the design of a supermarket, there are to be...Ch. 4 - A jet aircraft is accelerating at 3.8m/s2 as it...Ch. 4 - A 7650-kg helicopter accelerates upward at 0.80...Ch. 4 - A super high-speed 14-car Italian train has a mass...Ch. 4 - A fisherman in a boat is using a 10-lb test...Ch. 4 - An elevator in a tall building is allowed to reach...Ch. 4 - Two rock climbers, Bill and Karen, use safety...Ch. 4 - Three mountain climbers who are roped together in...Ch. 4 - A doomsday asteroid with a mass of 1.0 1010kg is...Ch. 4 - A 450-kg piano is being unloaded from a truck by...Ch. 4 - Consider the system shown in Fig. 462 with mA =...Ch. 4 - A 1.5-kg block rests on top of a 7.5-kg block...Ch. 4 - You are driving home in your 750-kg car at 15 m/s....Ch. 4 - (II) A large crate of mass 1500 kg starts sliding...
Additional Science Textbook Solutions
Find more solutions based on key concepts
At the right is a sketch showing one of the atoms in the diffuse, cool cloud of gas described in the previous q...
Lecture- Tutorials for Introductory Astronomy
9. Blocks with masses of 1 kg, 2 kg, and 3 kg are lined up in a row on a frictionless table. All three are push...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
17.|||
a. When the displacement of a mass on a spring is what fraction of the mechanical energy is kinetic en...
College Physics: A Strategic Approach (4th Edition)
A wire loop moves translationally (no rotation) in a uniform magnetic field. Is there an emf induced in the loo...
University Physics Volume 2
31. A parallel-plate capacitor is constructed of two horizontal 12.0-cm-diameter circular plates, A 1 0 g plast...
College Physics: A Strategic Approach (3rd Edition)
The speed of the person sitting on the chair relative to the chair and relative to Earth.
Conceptual Physics (12th Edition)
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
- 6. A graph of v(t) is shown for a lion in the figure. (a) What is the lion's average velocity for the first 4 s? (b) What is its instantaneous velocity at t = 6 s? (c) What is its average acceleration between 0 and 5 seconds? (d) What is the distance the lion Runner Velocity vs. Time ran? Velocity (m/s) 14 12 10 2 0 6 Time (s) 8 10 12arrow_forwardAs a city planner, you receive complaints from local residents about the safety of nearby roads and streets. One complaint concerns a stop sign at the corner of Pine Street and 1st Street. Residents complain that the speed limit in the area (55 mph) is too high to allow vehicles to stop in time. Under normal conditions this is not a problem, but when fog rolls in visibility can reduce to only 155 ft. Since fog is a common occurrence in this region, you decide to investigate. The state highway department states that the effective coefficient of friction between a rolling wheel and asphalt ranges between 0.536 and 0.599, whereas the effective coefficient of friction between a skidding (locked) wheel and asphalt ranges between 0.350 and 0.480. Vehicles of all types travel on the road, from small VW bugs weighing 1310 lb to large trucks weighing 8.40 x 10° lb. Considering that some drivers will brake properly when slowing down and others will skid to stop, calculate the minimum and maximum…arrow_forwardAs a city planner, you receive complaints from local residents about the safety of nearby roads and streets. One complaint concerns a stop sign at the corner of Pine Street and 1st Street. Residents complain that the speed limit in the area (55 mph) is too high to allow vehicles to stop in time. Under normal conditions this is not a problem, but when fog rolls in visibility can reduce to only 155 ft. Since fog is a common occurrence in this region, you decide to investigate. The state highway department states that the effective coefficient of friction between a rolling wheel and asphalt ranges between 0.536 and 0.599, whereas the effective coefficient of friction between a skidding (locked) wheel and asphalt ranges between 0.350 and 0.480. Vehicles of all types travel on the road, from small VW bugs weighing 1410 lb to large trucks weighing 8250 lb. Considering that some drivers will brake properly when slowing down and others will skid to stop, calculate the minimum and maximum…arrow_forward
- As a city planner, you receive complaints from local residents about the safety of nearby roads and streets. One complaint concerns a stop sign at the corner of Pine Street and 1st Street. Residents complain that the speed limit in the area (55 mph) is too high to allow vehicles to stop in time. Under normal conditions this is not a problem, but when fog rolls in visibility can reduce to only 155 ft. Since fog is a common occurrence in this region, you decide to investigate. The state highway department states that the effective coefficient of friction between a rolling wheel and asphalt ranges between 0.689 and 0.770, whereas the effective coefficient of friction between a skidding (locked) wheel and asphalt ranges between 0.450 and 0.617. Vehicles of all types travel on the road, from small VW bugs weighing 1210 lb to large trucks weighing 8640 lb. Considering that some drivers will brake properly when slowing down and others will skid to stop, calculate the minimum and maximum…arrow_forwardWhen visiting a friend in Atlanta you decide to drive around the city. You turn a corner and are driving up a steep hill. Suddenly, a small boy runs out on the street chasing a ball. You slam on the brakes and skid to a stop leaving a 50-foot-long skid mark on the street. The boy calmly walks away but a policemen watching from the sidewalk walks over and gives you a speeding ticket. He points out that the speed limit on this street is 25mph. After you recover your wits, you begin to examine the situation. You determine that the street makes an angle of 25◦ with the horizontal and that the coefficient of static friction between your tires and the street is 0.80. You also find that the coefficient of kinetic friction between your tires and the street is 0.60. Your car’s information book tells you that the mass of your car is 1600 kg. You weigh 140 lbs. Will you fight the ticket in court? Please draw a figure with your detailed answer.arrow_forwardWhen visiting a friend in Atlanta you decide to drive around the city. You turn a corner and are driving up a steep hill. Suddenly, a small boy runs out on the street chasing a ball. You slam on the brakes and skid to a stop leaving a 50-foot-long skid mark on the street. The boy calmly walks away but a policemen watching from the sidewalk walks over and gives you a speeding ticket. He points out that the speed limit on this street is 25mph. After you recover your wits, you begin to examine the situation. You determine that the street makes an angle of 25◦ with the horizontal and that the coefficient of static friction between your tires and the street is 0.80. You also find that the coefficient of kinetic friction between your tires and the street is 0.60. Your car’s information book tells you that the mass of your car is 1600 kg. You weigh 140 lbs. Draw a figure for this question. Will you fight the ticket in court?arrow_forward
- Fast Car: On a hot day in the flats, the temperature is 106.2 degrees. A driver finds an empty, flat stretch of desert that is 1913 meters long and decides to push the limits of his car. He finds the car can accelerate from 0 to 60 mph (26.8 m / s) in 4.95 s. Now he wants to see how fast the car can go. Assume the car maintains the same average acceleration until it reaches its top speed of 87.9 m / s. (a) How long will it take the car to reach its top speed? (b) How far will the car travel before it reaches its top speed?arrow_forwardcan you please solve both questions?arrow_forwardA skier leaves the top of a slope with an initial speed of 5.0 m/s. Her speed at the bottom of the slope is 13 m/s. What is the height of the slope?arrow_forward
- Step by step explanation?arrow_forwardA boxer's fist and glove have a mass of m = 1.04 kg. The boxer's fist can obtain a speed of v = 9.25 m/s in a time of t = 0.21 s. Write a symbolic expression for the magnitude of the average acceleration, aave, of the boxer's fist, in terms of the variables provided. Find the magnitude of the average acceleration, aave, in meters per square second. Write an expression for the magnitude of the average net force, Fb, that the boxer must apply to his fist to achieve the given velocity. (Write the expression in terms of m, v and t.) What is the numerical value of Fb, in newtons?arrow_forwardCheetahs can accelerate to a speed of 20.2 m/s in 2.65 s and can continue to accelerate to reach a top speed of 29.0 m/s . Assume the acceleration is constant until the top speed is reached and is zero thereafter. Let the +? direction point in the direction the cheetah runs.Express the cheetah's top speed ?top in miles per hour (mi/h) .Starting from a crouched position, how much time ?accel does it take a cheetah to reach its top speed and what distance ? does it travel in that time?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON
Newton's Second Law of Motion: F = ma; Author: Professor Dave explains;https://www.youtube.com/watch?v=xzA6IBWUEDE;License: Standard YouTube License, CC-BY