Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 6CQ
Give some everyday examples of situations in which friction is beneficial.
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A book slides across a level, carpeted floor with an initial speed of 3.85 m/s and comes to rest after 3.75 m. Calculate the
coefficient of kinetic friction between the book and the carpet. Assume the only forces acting on the book are friction, weight,
and the normal force.
μ =
X10
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A book with initial velocity 4.46m/s. if the coefficient of kinetic friction between the book and the horizontal floor is 0.4, how far (in meters) will the book slide before coming to rest?
An object is given an initial speed of 5 m/s on a horizontal surface.It slides 10 m on the horizontal surface before it stops due to friction.What is the coefficient of kinetic friction between the object and the surface?
Chapter 6 Solutions
Physics (5th Edition)
Ch. 6.1 - A block rests on a rough, horizontal surface, as...Ch. 6.2 - When a mass is attached to a certain spring, the...Ch. 6.3 - Suppose the tension in the clothesline in Quick...Ch. 6.4 - Three boxes are connected by ropes and pulled...Ch. 6.5 - A system consists of an object with mass m and...Ch. 6 - A clothesline always sags a little, even if...Ch. 6 - In the Jurassic Park sequel, The Lost World, a man...Ch. 6 - When a traffic accident is investigated, it is...Ch. 6 - In a car with rear-wheel drive, the maximum...Ch. 6 - A train typically requires a much greater distance...
Ch. 6 - Give some everyday examples of situations in which...Ch. 6 - At the local farm, you buy a flat of strawberries...Ch. 6 - It is possible to spin a bucket of water in a...Ch. 6 - Water sprays off a rapidly turning bicycle wheel....Ch. 6 - Can an object be in translational equilibrium if...Ch. 6 - Prob. 11CQCh. 6 - The gravitational attraction of the Earth is only...Ch. 6 - A popular carnival ride has passengers stand with...Ch. 6 - Referring to Question 13, after the cylinder...Ch. 6 - Your car is stuck on an icy side street. Some...Ch. 6 - The parking brake on a car causes the rear wheels...Ch. 6 - BIO The foot of your average gecko is covered with...Ch. 6 - Discuss the physics involved in the spin cycle of...Ch. 6 - The gas pedal and the brake pedal are capable of...Ch. 6 - In the movie 2001: A Space Odyssey, a rotating...Ch. 6 - When rounding a corner on a bicycle or a...Ch. 6 - Predict/Explain You push two identical bricks...Ch. 6 - Predict/Explain Two drivers traveling side-by-side...Ch. 6 - A 1.8-kg block slides on a horizontal surface with...Ch. 6 - A child goes down a playground slide with an...Ch. 6 - What is the minimum horizontal force F needed to...Ch. 6 - What is the minimum horizontal force F needed to...Ch. 6 - The three identical boxes shown in Figure 6-33...Ch. 6 - To move a large crate across a rough floor, you...Ch. 6 - Predict/Calculate A 37-kg crate is placed on an...Ch. 6 - Coffee To Go A person places a cup of coffee on...Ch. 6 - A mug rests on an inclined surface, as shown in...Ch. 6 - Predict/Calculate Force Times Distance At the...Ch. 6 - Prob. 13PCECh. 6 - A certain spring has a force constant k. (a) If...Ch. 6 - A certain spring has a force constant k. (a) If...Ch. 6 - Pulling up on a rope you lift a 7.27-kg bucket of...Ch. 6 - When a 9.09-kg mass is placed on top of a vertical...Ch. 6 - Predict/Calculate A backpack full of books...Ch. 6 - Two springs, with force constants k1= 150N/m and...Ch. 6 - Predict/Calculate Illinois Jones is being pulled...Ch. 6 - Predict/Calculate A spring with a force constant...Ch. 6 - A spring is suspended vertically from the ceiling...Ch. 6 - Mechanical Advantage The pulley system shown in...Ch. 6 - Pulling the string on a bow back with a force of...Ch. 6 - In Figure 6-42 we see two blocks connected by a...Ch. 6 - BIO Traction After a skiing accident, your leg is...Ch. 6 - Two blocks are connected by a string, as shown in...Ch. 6 - Predict/Calculate The system shown in Figure 6-45...Ch. 6 - Predict/Explain (a) Referring to the hanging...Ch. 6 - BIO Spiderweb Forces An orb-weaver spider sits in...Ch. 6 - A 0.15-kg ball is placed in a shallow wedge with...Ch. 6 - Predict/Calculate A picture hangs on the wall...Ch. 6 - Predict/Calculate You want to nail a 1.6-kg board...Ch. 6 - Prob. 34PCECh. 6 - In Example 6-13 (Connected Blocks), suppose m1 and...Ch. 6 - Predict/Explain Suppose m1 and m2 in Example 6-14...Ch. 6 - Three boxes of masses m, 2m, and 3m are connected...Ch. 6 - Find the acceleration of the masses shown in...Ch. 6 - Predict/Calculate (a) If the hanging mass m3 in...Ch. 6 - Two blocks are connected by a string, as shown in...Ch. 6 - Predict/Calculate A 3 50-kg block on a smooth...Ch. 6 - Predict/Calculate A 7.7-N force pulls horizontally...Ch. 6 - Predict/Calculate (a) Find the magnitude of the...Ch. 6 - A car drives with constant speed on an elliptical...Ch. 6 - A puck attached to a string undergoes circular...Ch. 6 - BIO Bubble Net Fishing Humpback whales sometimes...Ch. 6 - When you take your 1900-kg car out for a spin, you...Ch. 6 - BIO A Human Centrifuge To test the effects of high...Ch. 6 - A car goes around a curve on a road that is banked...Ch. 6 - Clearview Screen Large ships often have circular...Ch. 6 - Predict/Calculate (a) As you ride on a Ferris...Ch. 6 - Driving in your car with a constant speed of v =...Ch. 6 - CE If you weigh yourself on a bathroom scale at...Ch. 6 - CE BIO Maneuvering a Jet Humans lose consciousness...Ch. 6 - CE BIO Gravitropism As plants grow, they tend to...Ch. 6 - BIO Human-Powered Centrifuge One of the hazards of...Ch. 6 - Predict/Calculate A 9 3-kg box slides across the...Ch. 6 - A child goes down a playground slide that is...Ch. 6 - Spin-Dry Dragonflies Some dragonflies splash down...Ch. 6 - The da Vinci Code Leonardo da Vinci (1452-1519) is...Ch. 6 - A 4 5-kg sled is pulled with constant speed across...Ch. 6 - A 0 045-kg golf ball hangs by a string from the...Ch. 6 - A physics textbook weighing 22 N rests on a desk....Ch. 6 - Predict/Calculate The blocks shown in Figure 6-64...Ch. 6 - A Conical Pendulum A 0 075-kg toy airplane is tied...Ch. 6 - A tugboat tows a barge at constant speed with a...Ch. 6 - Predict/Calculate Two blocks, stacked one on top...Ch. 6 - Predict/Calculate In a daring rescue by helicopter...Ch. 6 - Predict/Calculate A light spring with a fore...Ch. 6 - Predict/Calculate The blocks in Figure 6-69 have...Ch. 6 - Predict/Calculate Playing a Violin The tension in...Ch. 6 - Predict/Calculate A 9 8-kg monkey hangs from a...Ch. 6 - As your plane circles an airport, it moves in a...Ch. 6 - At a playground, a 22-kg child sits on a spinning...Ch. 6 - A 2.0-kg box rests on a plank that is inclined at...Ch. 6 - A wood block of mass m rests on a larger wood...Ch. 6 - A hockey puck of mass m is attached to a string...Ch. 6 - Predict/Calculate A popular ride at amusement...Ch. 6 - A Conveyor Belt A box is placed on a conveyor belt...Ch. 6 - As part of a circus act, a person drives a...Ch. 6 - On the straight-line segment II in Figure 6-76 (b)...Ch. 6 - 82. Rank the straight segments I, II, and III in...Ch. 6 - In use on a typical human nose, the end-to-end...Ch. 6 - Predict/Calculate Referring to Example 6-3 Suppose...Ch. 6 - Predict/Calculate Referring to Example 6-3 The...Ch. 6 - Referring to Example 6-13 Suppose that the mass on...Ch. 6 - Referring to Example 6-15 (a) At what speed will...
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- Which of the following is correct? The angle of friction is equal to depression angle at impending motion The angle of friction is greater than to inclination angle at impending motion The angle of friction is less than to depression angle at impending motion The angle of friction is equal to inclination angle at impending motionarrow_forwardA rock rests on a horizontal plane. The plane is slowly tilted so that the angle between the surface and the horizontal increases to 20 degrees, at which point the rock is about to slip. What is the coefficient of static friction between the rock and the surface, to two significant figures? O 0.36 2.2 3.4 9.4 O 13 Oarrow_forwardA 20-kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. What is the coefficient of kinetic friction, Hk, of the surface from A to B? 5.0 m A 19 m 0.11 0.52 0.26 0.33 0.47arrow_forward
- How can a friction coefficient be found in a physics problem?arrow_forwardBob borrows a lunch tray of negligible mass to push Will on the tray across a level portion of the field. The coefficient of kinetic friction between the tray and the grass is 0.25 and the coefficient of static friction is 0.30. Will is pushed 40m across the field by Bob at a constant speed, but Bob is so tall that he pushes with a force of 40 degrees below the horizontal. Will gained some weight during quarantine, so he now weighs 120kg. a) What power does Bob need to move Will across the field in 20sec? b) What could Bob do to decrease the work he needs to push Will across the field without decreasing his force?arrow_forwardA skier is on a mountain whose slope is 20 °. The coefficient of kinetic friction is 0.22. At a certain instant, he has a speed of 8.9 m / s and from that moment he travels 120 m, what is the speed at the end of that journey? a) 19.90 m/s b) 29.12 m/s c) 46.19 m/s d) 23.81 m/sarrow_forward
- Which of the following best describes the directions of friction and normal force? Your answer: Friction is always horizontal and normal force is always vertical. Friction is always horizontal and normal force is always perpendicular to the surface. Friction is always parallel to the surface and normal force is always vertical. Friction is always parallel to the surface and normal force is always perpendicular to the surface. There is no consistent pattern.arrow_forwardA car driving on level ground at 20.0 m/s slams on its brakes and skids to a halt. If the coefficient of kinetic friction between the car's tires and the road is 0.750, how far does the car skid before stopping? How far would the car have skid if it had been going 40.0 m/s?arrow_forwardSisyphus was a character in Greek mythology and was doomed in Hades to push a boulder to the top of a steep mountain. When he reached the top, the boulder would roll back down the mountain and he would have to start all over again. The coefficient of static friction between the boulder and the mountainside is 0.200, the mass of the boulder is 136kg (300 lbs), and the slope of the mountain is a constant 30.00. What is the force in pounds that Sisyphus must exert on the boulder to move it up the mountain at a constant velocity?arrow_forward
- A car is moving at 20 m/s along a horizontal road has its brakes suddenly applied and eventually comes to rest. What is the shortest distance in which it can be stopped if the friction coefficient between tires and road is 0.90? Assume that all four wheels brake identically. If the brakes don't lock the car stops via static friction.arrow_forwardA block is sent up an incline with a velocity of 3.51 m/s. Assume there is no friction between the incline and the block. The angle is at an incline of 31.1 degrees with the horizontal. A) How far up the incline does the block go? B) How long does it take to get there? C) What is it's speed when it gets back to the bottom?arrow_forwardBelow are six crates at rest on level surfaces. The crates have different masses and the frictional coefficients between the crates and the surfaces differ. The same external force is applied to each crate, but none of the crates move. Rank the crates on the basis of the frictional force acting on them. Largest to smallestarrow_forward
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