Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 6, Problem 1PCE
Predict/Explain You push two identical bricks across a tabletop with constant speed, U, as shown in Figure 6-29 in case 1, you place the bricks end to end, in case 2, you stack the bricks one on top of the other. (a) Is the
Figure 6-29
Problem 1
- I. The normal force in case 2 is larger and hence the bricks press down more firmly against the tabletop.
- II. The normal force is the same in the two cases and friction is independent of surface area.
- III. Case 1 has more surface area in contact with the tabletop, and this leads to more friction.
Expert Solution & Answer
Learn your wayIncludes step-by-step video
schedule04:34
Students have asked these similar questions
Suppose m1 and m2 in Example 6-14(Atwood’s Machine) are both increased by 1 kg. Does the acceleration of the blocks increase, decrease, or stay the same? (b) Choosethe best explanation from among the following:I. The net force acting on the blocks is the same, but the totalmass that must be accelerated is greater.II. The difference in the masses is the same, and this is what determines the net force on the system.III. The force exerted on each block is greater, leading to an increased acceleration.
Two boxes are connected by a rope that passes over a pulley (Figure 6-31). Box #1 is on a ramp inclined at 35° to the horizontal, and the coefficient of kinetic friction between the box and ramp is 0.54. The masses of the boxes are m1 5 2.5 kg and m2 5 5.5 kg. Neglecting the motion of the pulley and assuming that the velocity of each box is in the same direction as its acceleration, what is the magnitude of the acceleration of the boxes?
Largely because of riding in cars, you are used to horizontal circular motion. Vertical circular motion would be anovelty. In this sample problem, such motion seems todefy the gravitational force.In a 1901 circus performance, Allo “Dare Devil”Diavolo introduced the stunt of riding a bicycle in a loopthe-loop (Fig. 6-9a). Assuming that the loop is a circle withradius R 2.7 m, what is the least speed v that Diavolo andhis bicycle could have at the top of the loop to remain incontact with it there?
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...
Additional Science Textbook Solutions
Find more solutions based on key concepts
36.68 CALC It is possible to calculate the intensity in the single-slit Fraunhofer diffraction pattern without ...
University Physics with Modern Physics (14th Edition)
The setup depicted in Figure 4.6 is used in a diffraction experiment using X-rays of 0.26 nm wavelength. Constr...
Modern Physics
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective
2. A clothesline is hung between two poles, and then a shirt is hung near the center of the line. No matter how...
College Physics (10th Edition)
A Carnot engine operates between 550 and 20 baths and produces 300 kJ of energy in each cycle. Find the chang...
University Physics Volume 2
Choose the best answer to each of the following. Explain your reasoning. The event that triggered the change in...
Cosmic Perspective Fundamentals
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
- A warehouse worker is pushing a 90.0 kg crate with a horizontal force of 276N at a speed of v = 0.875m/s across the warehouse floor. He encounters a rough horizontal section of the floor that is 0.75 m long and where the coefficient of kinetic friction between the crate and floor is 0.353. (a) Determine the magnitude and direction of the net force acting on the crate while it is pushed over the rough section of the floor. magnitude Ndirection ---Select--- up down in the same direction as the motion of the crate in the opposite direction as the motion of the crate (b) Determine the net work done on the crate while it is pushed over the rough section of the floor. J (c) Find the speed of the crate when it reaches the end of the rough surface. m/sarrow_forwardA 6.0-kg block initially at rest is pulled to the right along a horizontal surface by a constant horizontal force of magnitude 12 N.(A) Find the speed of the block after it has moved 3.0 m if the surfaces in contact have a coefficient of kinetic friction of 0.15. (B) Suppose the force F→ is applied at an angle θ as shown in (8.8b). At what angle should the force be applied to achieve the largest possible speed after the block has moved 3.0 m to the right?arrow_forwardA 2.20 kg block is initially at rest on a horizontal surface. A horizontal force of magnitude 4.83 N and a vertical force are then applied to the block (Fig. 6-17). The coefficients of friction for the block and surface are µs = 0.4 and µk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of is (a) 8.00 N and (b) 12.0 N. (The upward pull is insufficient to move the block vertically.)arrow_forward
- A fluid‑like substance called synovial fluid lubricates the surfaces where bones meet in joints, making the coefficient of static friction between bones very small. For simplicity, assume the surfaces in the knee are flat and horizontal. Why is the minimum force required for initiating movement of bones in a typical knee joint different for different people, in spite of the fact that their joints have the same coefficient of static friction?arrow_forwardA hockey puck on a frozen pond is given an initial speed of 20.0 m/s. If the puck always remains on the ice and slides 115 m before coming to rest, determine the coefficient of kinetic friction between the puck and ice.arrow_forwardA 0.075 kg toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 4.47 m/s in a horizontal circle of radius 1.28 m, as illustrated in Figure 6-40 (image attached). Find (a) the angle the string makes with the vertical and (b) the tension in the string.arrow_forward
- Cliff divers in acapulco dive into the ocean from h=35m high cliffs. The divers are moving 26 m/s downward in the vertical direction. They travel in a straight line over a distance of 4m through the water before momentarily coming to a rest. Assuming the diver jumps with an initial horizontal velocity of 3.5 m/s. What is the magnitude of the net force on a 70 kg diver?arrow_forwardA man pushing a crate of mass m = 92.0 kg at a speed of v = 0.860 m/s encounters a rough horizontal surface of length ℓ = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.357 and he exerts a constant horizontal force of 288 N on the crate. (a) Find the magnitude and direction of the net force on the crate while it is on the rough surface. magnitude N direction ---Select--- opposite as the motion of the crate same as the motion of the crate (b) Find the net work done on the crate while it is on the rough surface. J(c) Find the speed of the crate when it reaches the end of the rough surface. m/sarrow_forwardA roller-coaster car is towed up an incline at a steady speed of 0.500 m/s by a chain parallel to the surface of the incline. The slope is 3.00%, which means that the elevation increases by 3.00 m for every 100.0 m of horizontal distance. The mass of the roller-coaster car is 594 kg. Ignoring friction, what is the magnitude of the force exerted on the car by the chain?arrow_forward
- The vertical jump height of Michael Jordan (a famous NBA player) is 122cm during his career as a player. His body height is 1.98m. His body weight was 98kg in that same period. Assume that the force his legs act on his body is constant. Also assume that when standing, the height of his center of gravity is half of his body height, and that when he bends his legs at the starting position of jump, his center of gravity decreases to half of the value of standing. (a) Estimate the force that his legs act on the floor, and (b) estimate the duration of the acceleration.arrow_forwardWhile jumping on a trampoline, sometimes you land on your back and other times on your feet. In which case can you reach a greater height and why?arrow_forwardA skier starts at rest at the top of a large hemispherical hill (Fig. P7.63). Neglecting friction, show that the skier will leave the hill and become airborne at a distance h = R/3 below the top of the hill. Hint: At this point, the normal force goes to zero. Figure P7.63arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
Classical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
University Physics Volume 1
Physics
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:OpenStax - Rice University
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Classical Dynamics of Particles and Systems
Physics
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
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