University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 5, Problem 5.30E
Some sliding rocks approach the base of a hill with a speed of 12 m/s. The hill rises at 36° above the horizontal and has coefficients of kinetic friction and static friction of 0.45 and 0.65, respectively, with these rocks. (a) Find the acceleration of the rocks as they slide up the hill. (b) Once a rock reaches its highest point, will it stay there or slide down the hill? If it stays, show why. If it slides, find its acceleration on the way down.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Two penguins, Wheezy and Mumble, are racing down an icy slope into the water below. Wheezy has a mass of 22 kg. Mumble has a mass of 25 kg. The slope is angled at eight degrees to the horizontal. They both start from the same position at the same time, and slide down the icy slope entirely due to gravity alone. There is a coefficient of kinetic friction of 0.12 between the penguins and the ice. Who wins the race and what is the winner's acceleration when they reach the finish line (ie the water)?
Show that the acceleration of any object down an incline where friction behaves simply (that is, where fk=μkN)fk=μkN) is a=g(sinθ−μkcosθ).a=g(sinθ−μkcosθ). Note that the acceleration is independent of mass and reduces to the expression found in the previous problem when friction becomes negligibly small (μk=0).(μk=0).
A skier with a mass of 60 kg is sliding down a snowy slope, the slope with an angle of 30 degrees above the horizontal as shown in the figure. Find the acceleration for the skier if friction is known to be 45.0 N. Assuming no air resistance and g=10m/s^2.
a) 10 m/s^2
b) 0.75 m/s^2
c) 4.25 m/s^2
d) 1.33 m/s^2
Chapter 5 Solutions
University Physics (14th Edition)
Ch. 5 - A man sits in a seat that is hanging from a rope....Ch. 5 - In general, the normal force is not equal to the...Ch. 5 - A clothesline hangs between two poles. No matter...Ch. 5 - You drive a car up a steep hill at constant speed....Ch. 5 - For medical reasons, astronauts in outer space...Ch. 5 - To push a box up a ramp, which requires less...Ch. 5 - A woman in an elevator lets go of her briefcase,...Ch. 5 - A block rests on an inclined plane with enough...Ch. 5 - A crate slides up an inclined ramp and then slides...Ch. 5 - A crate of books rests on a level floor. To move...
Ch. 5 - In a world without friction, which of the...Ch. 5 - When you stand with bare feet in a wet bathtub,...Ch. 5 - You are pushing a large crate from the back of a...Ch. 5 - It is often said that friction always opposes...Ch. 5 - If there is a net force on a particle in uniform...Ch. 5 - A curve in a road has a bank angle calculated and...Ch. 5 - You swing a ball on the end of a lightweight...Ch. 5 - The centrifugal force is not included in the...Ch. 5 - A professor swings a rubber stopper in a...Ch. 5 - To keep the forces on the riders within allowable...Ch. 5 - A tennis ball drops from rest at the top of a tall...Ch. 5 - You throw a baseball straight upward with speed 0....Ch. 5 - You throw a baseball straight upward. If you do...Ch. 5 - You have two identical tennis balls and fill one...Ch. 5 - A ball is dropped from rest and feels air...Ch. 5 - A ball is dropped from rest and feels air...Ch. 5 - When a balled baseball moves with air drag, when...Ch. 5 - A ball is thrown from the edge of a high cliff....Ch. 5 - Two 25.0-N weights are suspended at opposite ends...Ch. 5 - In Fig. E5.2 each of the suspended blocks has...Ch. 5 - A 75.0-kg wrecking ball hangs from a uniform,...Ch. 5 - BIO Injuries to the Spinal Column. In the...Ch. 5 - A picture frame hung against a wall is suspended...Ch. 5 - A large wrecking ball is held in place by two...Ch. 5 - Find the tension in each cord in Fig. E5.7 if the...Ch. 5 - A 1130-kg car is held in place by a light cable on...Ch. 5 - A man pushes on a piano with mass 180 kg; it...Ch. 5 - In Fig. E5.10 the weight w is 60.0 N. (a) What is...Ch. 5 - BIO Stay Awake! An astronaut is inside a 2.25 106...Ch. 5 - A rocket of initial mass 125 kg (including all the...Ch. 5 - CP Genesis Crash. On September 8, 2004, the...Ch. 5 - Three sleds are being pulled horizontally on...Ch. 5 - Atwoods Machine. A 15.0-kg load of bricks hangs...Ch. 5 - CP An 8.00-Kg block of ice, released from rest at...Ch. 5 - A light rope is attached to a block with mass 4.00...Ch. 5 - CP Runway Design. A transport plane lakes off from...Ch. 5 - CP A 750.0-kg boulder is raised from a quarry 125...Ch. 5 - Apparent Weight. A 550-N physics student stands on...Ch. 5 - CP BIO Force During a Jump. When jumping straight...Ch. 5 - CP CALC A 2540-kg test rocket is launched...Ch. 5 - CP CALC A 2.00-kg box is moving to the right with...Ch. 5 - CP CALC A 5.00-kg crate is suspended from the end...Ch. 5 - BIO The Trendelenburg Position. After emergencies...Ch. 5 - In a laboratory experiment on friction, a 135-N...Ch. 5 - CP A stockroom worker pushes a box with mass 16.8...Ch. 5 - A box of bananas weighing 40.0 N rests on a...Ch. 5 - A 45.0-kg crate of tools rests on a horizontal...Ch. 5 - Some sliding rocks approach the base of a hill...Ch. 5 - A box with mass 10.0 kg moves on a ramp that is...Ch. 5 - A pickup truck is carrying a toolbox, but the rear...Ch. 5 - You are lowering two boxes, one on top of the...Ch. 5 - Consider the system shown in Fig. E5.34. Block A...Ch. 5 - CP Stopping Distance. (a) If the coefficient of...Ch. 5 - CP A 25.0-kg box of textbooks rests on a loading...Ch. 5 - Two crates connected by a rope lie on a horizontal...Ch. 5 - A box with mass m is dragged across a level floor...Ch. 5 - CP As shown in Fig. E5.34, block A (mass 2.25 kg)...Ch. 5 - You throw a baseball straight upward. The drag...Ch. 5 - A large crate with mass m rests on a horizontal...Ch. 5 - (a) In Example 5.18 (Section 5.3), what value of D...Ch. 5 - A stone with mass 0.80 kg is attached to one end...Ch. 5 - BIO Force on a Skaters Wrist. A 52-kg ice skater...Ch. 5 - A small remote-controlled car with mass 1.60 kg...Ch. 5 - 5.46A small car with mass 0.800 kg travels at...Ch. 5 - A small model car with mass m travels at constant...Ch. 5 - A flat (unbanked) curve on a highway has a radius...Ch. 5 - A 1125-kg car and a 2250-kg pickup truck approach...Ch. 5 - The Giant Swing at a county fair consists of a...Ch. 5 - In another version of the Giant Swing (see...Ch. 5 - A small button placed on a horizontal rotating...Ch. 5 - Rotating Space Stations. One problem for humans...Ch. 5 - The Cosmo Clock 21 Ferris wheel in Yokohama,...Ch. 5 - An airplane flies in a loop (a circular path in a...Ch. 5 - A 50.0-kg stunt pilot who has been diving her...Ch. 5 - Stay Dry! You tie a cord to a pail of water and...Ch. 5 - A bowling ball weighing 71.2 N (16.0 lb) is...Ch. 5 - BIO Effect on Blood of Walking. While a person is...Ch. 5 - An adventurous archaeologist crosses between two...Ch. 5 - Two ropes are connected to a steel cable that...Ch. 5 - In Fig. P5.62 a worker lifts a weight w by pulling...Ch. 5 - In a repair shop a truck engine that has mass 409...Ch. 5 - A horizontal wire holds a solid uniform ball of...Ch. 5 - A solid uniform 45.0-kg ball of diameter 32.0 cm...Ch. 5 - CP A box is sliding with a constant speed of 4.00...Ch. 5 - CP BIO Forces During Chin-ups. When you do a...Ch. 5 - CP CALC A 2.00-kg box is suspended from the end of...Ch. 5 - CALC A 3.00-kg box that is several hundred meters...Ch. 5 - CP A 5.00-kg box sits at rest at the bottom of a...Ch. 5 - Two boxes connected by a light horizontal rope are...Ch. 5 - A 6.00-kg box sits on a ramp that is inclined at...Ch. 5 - CP An 8.00-kg box sits on a ramp that is inclined...Ch. 5 - CP In Fig. P5.74, m1 = 20.0 kg and = 53.1. The...Ch. 5 - CP You place a book of mass 5.00 kg against a...Ch. 5 - Block A in Fig. P5.76 weighs 60.0 N. The...Ch. 5 - A block with mass m1 is placed on an inclined...Ch. 5 - BIO The Flying Leap of a Flea. High-speed motion...Ch. 5 - Block A in Fig. P5.79 weighs 1.20 N, and block B...Ch. 5 - CP Elevator Design. You are designing an elevator...Ch. 5 - CP CALC You are standing on a bathroom scale in an...Ch. 5 - A hammer is hanging by a light rope from the...Ch. 5 - A 40.0-kg packing case is initially at rest on the...Ch. 5 - If the coefficient of static friction between a...Ch. 5 - Two identical 15.0-kg balls, each 25.0 cm in...Ch. 5 - CP Traffic Court. You are called as an expert...Ch. 5 - Block A in Fig. P5.87 weighs 1.90 N, and block B...Ch. 5 - CP Losing Cargo. A 12.0-kg box rests on the level...Ch. 5 - Block A in Fig. P5.89 has mass 4.00 kg, and block...Ch. 5 - Two blocks connected by a cord passing over a...Ch. 5 - In terms of m1, m2, and g, find the acceleration...Ch. 5 - Block B, with mass 5.00 kg, rests on block A, with...Ch. 5 - Two objects, with masses 5.00 kg and 2.00 kg, hang...Ch. 5 - Friction in an Elevator. You are riding in an...Ch. 5 - A block is placed against the vertical front of a...Ch. 5 - Two blocks, with masses 4.00 kg and 8.00 kg, are...Ch. 5 - Block A, with weight 3w, slides down an inclined...Ch. 5 - Jack sits in the chair of a Ferris wheel that is...Ch. 5 - Bunked Curve I. A curve with a 120-m radius on a...Ch. 5 - Banked Curve II. Consider a wet roadway banked as...Ch. 5 - Blocks A, B, and C are placed as in Fig. P5.101...Ch. 5 - You are riding in a school bus. As the bus rounds...Ch. 5 - CALC You throw a rock downward into water with a...Ch. 5 - A 4.00-kg block is attached to a vertical rod by...Ch. 5 - On the ride Spindletop at the amusement park Six...Ch. 5 - A 70-kg person rides in a 30-kg cart moving at 12...Ch. 5 - A small bead can slide without friction on a...Ch. 5 - A physics major is working to pay her college...Ch. 5 - DATA In your physics lab, a block of mass m is at...Ch. 5 - DATA A road heading due cast passes over a small...Ch. 5 - DATA You are an engineer working for a...Ch. 5 - Moving Wedge. A wedge with mass M rests on a...Ch. 5 - Figure P5.112 5.113A wedge with mass M rests on a...Ch. 5 - Double Atwoods Machine. In Fig. P5.114 masses m1...Ch. 5 - A ball is held at rest at position A in Fig....Ch. 5 - FRICTION AND CLIMBING SHOES. Shoes made for the...Ch. 5 - FRICTION AND CLIMBING SHOES. Shoes made for the...Ch. 5 - FRICTION AND CLIMBING SHOES. Shoes made for the...
Additional Science Textbook Solutions
Find more solutions based on key concepts
The magnitude of the angle subtended by the red blood cell viewed through this microscope.
Physics (5th Edition)
Write each number in scientific notation.
11. 0.000065
Applied Physics (11th Edition)
The diagram shows Bob’s view of the passing of two identical spaceships. Anna’s and his own, where v=2 . The le...
Modern Physics
24. The 1.0 kg block in FIGURE EX7.24 is tied to the wall with a rope. It sits on top of the 2.0 kg block. The ...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective
18.(II) (a) Determine the equivalent resistance of the “ladder” of equal 175-? resistors shown in Fig. 19-49. I...
Physics: Principles with Applications
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
- If a single constant force acts on an object that moves on a straight line, the objects velocity is a linear function of time. The equation v = vi + at gives its velocity v as a function of time, where a is its constant acceleration. What if velocity is instead a linear function of position? Assume that as a particular object moves through a resistive medium, its speed decreases as described by the equation v = vi kx, where k is a constant coefficient and x is the position of the object. Find the law describing the total force acting on this object.arrow_forwardA child is practicing for a BMX race. His speed remains constant as he goes counterclockwise around a level track with two straight sections and two nearly semicircular sections as shown in the aerial view of Figure OQ5.9. (a) Rank the magnitudes of his acceleration at the points A, B, C, D, and E from largest to smallest. If his acceleration is the same size at two points, display that fact in your ranking. If his acceleration is zero, display that fact. (b) What are the directions of his velocity at points A, B, and C? For each point, choose one: north, south, east, west, or nonexistent. (c) What are the directions of his acceleration at points A, B, and C? Figure OQ5.9arrow_forwardDuring a military training in Camp Jizmundo, Libas, Banga, Aklan , a sky diver of weighing 82 kg ( including equipment ) falls vertically downward from an altitude of 1500 meters, and opens the parachute after 10 sec of free fall. Assume that the force of air resistance is proportional to velocity. The air drag coefficient before opening the chute is k1 = 1.65 kg/sec , when the parachute is closed and after opening the chute k2 = 26.4 kg/sec.Take g = 9.8 m/s 2 . (a) Find the speed of the sky diver when the parachute opens ? (b) Find the distance fallen before the parachute opens.arrow_forward
- In a circus performance, a monkey on a sled is given an initial speed of 3.1 m/s up a 26◦ incline. The combined mass of the monkey and the sled is 20.2 kg, and the coefficient of kinetic friction between the sled and theincline is 0.71. The acceleration of gravity is 9.81 m/s 2.How far up the incline does the sled move? Answer in units of marrow_forwardA 20kg box sits on an incline 30degrees with the horizontal. The coefficient of kinetic friction between box and incline is 0.30. Find the acceleration of the box down the incline. A. 0.81 m/s^2 B. 2.35 m/s^2 C. 0.81 m/s D. 2.35 m/sarrow_forwardThe wheels of an automobile are locked as it slides to a stop from an initial speed of 30.0 m/s. If the coefficient of kinetic friction is 0.600 and the road is horizontal, approximately how long does it take the car to stop? 4.22 s 5.10 s 8.75 s 10.4 s No answerarrow_forward
- Tarzan, who weighs 777 N, swings from a cliff at the end of a 16.5 m vine that hangs from a high tree limb and initially makes an angle of 21.9° with the vertical. Assume that an x axis points horizontally away from the cliff edge and a y axis extends upward. Immediately after Tarzan steps off the cliff, the tension in the vine is 721 N. Just then, what are (a) the force from the vine on Tarzan in unit-vector notation, and (b) the net force acting on Tarzan in unit-vector notation? What are (c) the magnitude and (d) the direction (measured counterclockwise from the positive x-axis) of the net force acting on Tarzan? What are (e) the magnitude and (f) the direction of Tarzan's acceleration just then?arrow_forwardA city is trying to determine the speed limit for a given stretch of road. If a stop sign is visible from 62.0m on a straight, horizontal stretch of road and the coefficient of static friction between the road and the tires of a car is 0.525 then what is the maximum speed for a car in meters per second so that it can come to a complete stop at the stop sign?arrow_forwardFor item numbers 21, refer to this situation: After being struck by a stick, a ball with a mass of 0.10 kg slows down as it rolls on a level floor. The frictional force that acts on the ball is 0.32 N, to the left. 21. What is the magnitude and direction of the ball's acceleration? 0.31 m/s^2, to the left 0.31 m/s^2, to the right 3.2 m/s^2, to the left 3.2 m/s^2, to the right For item numbers 22 to 25, refer to this situation: A crate, with a mass of 1000 kg, is being lowered down using a rope that is attached to a pulley. The tension acting on the crate due to the rope is 7200 N, upward. 22. What is the magnitude and direction of the crate's weight? 9800 N, downward 1000 N, upward 1000 N, downward 9800 N, upward 23. What is the magnitude and direction of the net force acting on the crate? 2600 N, upward 2600 N, downward 22200 N, upward 22200 N, downwardarrow_forward
- Biologists have estimated the drag coefficient of a swimming penguin by observing the rate at which a penguin’s speed decreases in its glide phase, when it’s not actively swimming and is slowing down. In one study, a gliding 4.8 kg Gentoo penguin has an acceleration of -0.52 m/s2 when its speed is 1.60 m/s. If its frontal area is 0.020 m2, what is the penguin’s drag coefficient?arrow_forwardThe coefficients of friction between the load and the flatbed trailer shown are μs= 0.40 and μk= 0.30. Knowing that the speed of the rig is 72 km/h, determine the shortest distance in which the rig can be brought to a stop if the load is not to shift.arrow_forwardA cake rests in a cardboard box on the horizontal surface of the seat of your car which is traveling at 11 m/s. If the coefficients of friction are µk = 0.3 and µs = 0.5, find the minimum stopping distance necessary to keep the cake box from sliding off the seat.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningGlencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Conservative and Non Conservative Forces; Author: AK LECTURES;https://www.youtube.com/watch?v=vFVCluvSrFc;License: Standard YouTube License, CC-BY