College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 5, Problem 5CQ
Athletes such as swimmers and bicyclists wear body suits in competition. Formulate a list of pros and cons of such suits.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
You decided to go to SM to buy a new pair of shoes. Upon picking the new pair of shoes you tried them on to see if it fits and with your wittiness you thought about pranking the sales lady standing beside you so you ran towards the exit door but manong guard is alert so he immediately closes the glass door of the exit before you reach it. So you tried to stop, what should be the coefficient of friction of the new pair of shoes and the floor in order for you not to slip and not to slam your face on the glass door if you have a slipping acceleration of 3m/s^2 and a body mass of 6kg.
Running on a treadmill is slightly easier than running outside because there is no drag force to work against. Suppose a 60 kg runner completes a 5.0 km race in 15 minutes.
Determine the drag force on the runner during the race. Suppose that the cross-section area of the runner is 0.72 m2.
What is this force as a fraction of the runner's weight?
A 70 kg bicyclist is riding her 15 kg bicycle downhill on a road with a slope of 80without pedaling or braking. The bicyclist has a frontal area of 0.45 m2and a dragcoefficient of 1.1 in the upright position, and a frontal area of 0.4 m2and a dragcoefficient of 0.9 in a racing position. If the downhill speed of the bicyclist(terminal velocity) can be determined when the total force acting on the “body” inthe direction of movement is equal to zero, determine the percentage of downspeed that she can be increased when she is in a racing position. Air temperatureis 150C and disregarding the rolling resistance and friction at the bearing.
Chapter 5 Solutions
College Physics
Ch. 5 - Define normal force. What is its relationship to...Ch. 5 - The glue on a piece of tape can exert forces. Can...Ch. 5 - When you learn to drive, you discover that you...Ch. 5 - When you push a piece of chalk across a...Ch. 5 - Athletes such as swimmers and bicyclists wear body...Ch. 5 - Two expressions were used for the drag force...Ch. 5 - As cars travel, oil and gasoline leaks onto the...Ch. 5 - Why can a squirrel jump from a tree branch to the...Ch. 5 - The elastic properties of the arteries are...Ch. 5 - What are you feeling when you feel your pulse?...
Ch. 5 - Examine different types of shoes, including sports...Ch. 5 - Would you expect your height to be different...Ch. 5 - Why can a squirrel from a tree branch to the...Ch. 5 - Explain why pregnant women often suffer from back...Ch. 5 - An old carpenter's trick to keep nails from...Ch. 5 - When a glass bottle full of vinegar warms up, both...Ch. 5 - A physics major is cooking breakfast when he...Ch. 5 - (a) When rebuilding her car's engine, a physics...Ch. 5 - (a) What is the maximum frictional force in the...Ch. 5 - Suppose you have a 120-kg wooden crate resting on...Ch. 5 - (a) If half of the weight of a small 1.00103 kg...Ch. 5 - A team of eight dogs pulls a sled with waxed wood...Ch. 5 - Consider the 65.0-kg ice skater being pushed by...Ch. 5 - Show that the acceleration of any object down a...Ch. 5 - Show that the acceleration of any object down an...Ch. 5 - Calculate the deceleration of a snow boarder going...Ch. 5 - (a) Calculate the acceleration of a skier heading...Ch. 5 - If an object is to rest on an incline without...Ch. 5 - Calculate the maximum deceleration of a car that...Ch. 5 - Calculate the maximum acceleration of a car that...Ch. 5 - Repeat Exercise 5.14 for a car with four-wheel...Ch. 5 - A freight train consists of two 8.00105 -kg...Ch. 5 - Consider the 52.0-kg mountain climber in Figure...Ch. 5 - A contestant in a winter sporting event pushes a...Ch. 5 - Repeat Exercise 5.18 with the contestant pulling...Ch. 5 - The terminal velocity of a person falling in air...Ch. 5 - A 60-kg and a go-kg skydiver jump from an airplane...Ch. 5 - A 560-g squirrel with a surface area of 930 cm2...Ch. 5 - To maintain a constant speed, the force provided...Ch. 5 - By what factor does the drag force on a car...Ch. 5 - Calculate the speed a spherical rain drop would...Ch. 5 - Using Stokes' law, verify that the units for...Ch. 5 - Find the terminal velocity of a spherical...Ch. 5 - Stokes' law describes sedimentation of particles...Ch. 5 - During a circus act, one performer swings upside...Ch. 5 - During a wrestling match, a 150 kg wrestler...Ch. 5 - (a) The "lead" in pencils is a graphite...Ch. 5 - TV broadcast antennas are the tallest artificial...Ch. 5 - (a) By how much does a 65.0-kg mountain climber...Ch. 5 - A 20.0-m tall hollow aluminum flagpole is...Ch. 5 - As an oil well is drilled, each new section of...Ch. 5 - Calculate the force a piano tuner applies to...Ch. 5 - A vertebra is subjected to a shearing force of 500...Ch. 5 - A disk between vertebrae in the spine is subjected...Ch. 5 - When using a pencil eraser, you exert a vertical...Ch. 5 - To consider the effect of wires hung on poles, we...Ch. 5 - A farmer making grape juice fills a glass bottle...Ch. 5 - (a) When water freezes, its volume increases by...Ch. 5 - This problem returns to the tightrope walker...Ch. 5 - The pole in Figure 5.24 is at a 90.0° bend in a...
Additional Science Textbook Solutions
Find more solutions based on key concepts
3. Suppose the door of a room makes an airtight, but frictionless, fit in its frame. Do you think you could ope...
College Physics (10th Edition)
The speed of the person sitting on the chair relative to the chair and relative to Earth.
Conceptual Physics (12th Edition)
The electromagnetic spectrum of light is often arranged in terms of frequency. Which one of the following has t...
Lecture- Tutorials for Introductory Astronomy
Predict: which spool will reach the floor first. Explain how your answer is consistent with your extended free-...
Tutorials in Introductory Physics
TEST YOUR UNDERSTANDING OF SECTION 36.1 Can sound waves undergo diffraction around an edge?
University Physics with Modern Physics (14th Edition)
57. (I) How long will It take a 2750-W motor to lift a 385-kg piano to a sixth-story window 16.0 m above?
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
- A factory needs to move packages from one level to another using a ramp. They want to choose a material that has a specific coefficient of friction with the packages that will be sliding down the ramp. What problem could occur if the coefficient of friction were too high? pur answer: Packages would go too fast and could break at the end of the ramp. Packages could slow down too quickly and stop before the end of the ramp. Packages could break the ramp because gravity would increase. Packages could bounce off the ramp because normal force would increase. Clear answerarrow_forwardb&Openvel ellumHMAC=13141246e870af52d9ff2eac3b336ad2#10001 山 ☆ What tension does his rope need to support? Mountaineers often use a rope to lower themselves down the face of a cliff (this is called rappelling). They do this with their body nearly horizontal and their feet pushing against the cliff (Figure 1). Suppose that an 77.6-kg climber, who is 1.97 m tall and has a center of gravity 1.1 m from his feet, rappels down a vertical cliff with his body raised 41.6° above the horizontal. He holds the rope 1.56 m from his feet, and it makes a 24.4° angle with the cliff face. Express your answer using two significant figures. ΑΣΦ 圈] ? T = Submit Request Answer Part B Find the horizontal component of the force that the cliff face exerts on the climber's feet. Express your answer using two significant figures. ? Þ3v DA FH N Submit Request Answer Part C Find the vertical component of the force that the cliff face exerts on the climber's feet. Express your answer using two significant figures.…arrow_forwardA desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a rope to a rock of mA = 405 kg and makes his way over the ledge (see the figure below). If the coefficient of static friction between the rock and the ground is H=0.348, and the mass of the hiker is ma= 70.1 kg, what is the maximum mass of the friend, mc, that the rock can hold so the hikers can then make their way up over the ledge? Assume the rope is parallel to the ground and the point where the rope passes over the ledge is frictionless. (ANS: 70.8 kg)arrow_forward
- . Asiacell ? 8:10 PM 38% O اسئلة الامتحان الثال. . . University of Technology Mechanical Engineering Department 2020-2021 Subject: Physics1 Class: First Year Division: power plant Timone hour Q1: The chain binder is used to secure loads of logs, lumber, pipe, and the like. If the tension T is 3 kN when 0 = 40°, determine the force P required on the lever and the corresponding tension T2 for this position. Assume that the surface under A is perfectly smooth. 650mm 100 mm T COO Q2: The force P is applied to (a) the 50 kg block and (b) the 150 kg block. For each case, determine the magnitude of P required to initiaite motion ? H = 0.40 50kg Pia) 4, = 0.12 150kg --YP(b)arrow_forwardA 80.0 kg mail bag hangs by a vertical rope 3.5 m long. A postal worker then displaces the bag to a position 2.4 m sideways from its original position, always keeping the rope taut.arrow_forwardA ski that is placed on snow will stick to the snow. However, when the ski is moved along the snow, the rubbing warms and partially melts the snow, reducing the coefficient of kinetic friction and promoting sliding.Waxing the ski makes it water repellent and reduces friction with the resulting layer of water. A magazine reports that a new type of plastic ski is especially water repellent and that, on a gentle 200 m slope in the Alps, a skier reduced his top-to-bottom time from 61 s with standard skis to 42 s with the new skis. Determine the magnitude of his average acceleration with (a) the standard skis and (b) the new skis. Assuming a 3.0 slope, compute the coefficient of kinetic friction for (c) the standard skis and (d) the new skisarrow_forward
- 12:29 A docs.google.com Question The Screamin Demons (Dr. Weiss and Mr. Devinney) have entered a bobsled race. The sled run is at an angle of 29°. Dr. Weiss has come up with a super slick bobsled with a coefficient of friction of 0.0112. The combined mass of the two dare devils and their bobsled is 200 kg. What will be the Screamin Demons acceleration down the bobsled run? Make a free body diagram identifying all the forces acting on the Screamin Demon Bobsled. Upload a snap shot of your free body diagram here. * 1, Add file Question 1 * Calculate the weight F, of loaded bobsled. Your answer Question 2 *arrow_forwardA desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a rope to a rock of mass ma and makes his way over the ledge (see the figure). If the coefficient of maximum static friction between the rock and the ground is µ, and the mass of the hiker is mâ, what is the maximum mass of the friend, mc, that the rock can hold so the hikers can then make their way up over the ledge? Assume the rope is parallel to the ground and the point where the rope passes over the ledge is frictionless. mc = Juarrow_forwardCallie is running a 400 m race around a 400 m track. On the backstretch her velocity is 8 m/s, but she is running into a 2 m/s headwind. How large is the drag force that acts on Callie? Assume that the density of the air is 1.2 kg/m3, that Callie’s cross-sectional area is 0.5 m2, and that her coefficient of drag is 1.1.arrow_forward
- 8. A factory needs to move packages from one level to another using a ramp. They want to choose a material that has a specific coefficient of friction with the packages that will be sliding down the ramp. a) What problem could occur if the coefficient of friction were too high? Your answer: O Packages would go too fast and could break at the end of the ramp. O Packages could slow down too quickly and stop before the end of the ramp. O Packages could break the ramp because gravity would increase. O Packages could bounce off the ramp because normal force would increase.arrow_forwardTires that are rolling across the road use static friction, and tires that slide across the road use kinetic friction. Which combination of motion and coefficient of friction (between the tire and the road) would allow a car to stop in the shortest amount of time? Your answer: a high coefficient of friction with a tire that rolls across the road a high coefficient of friction with a tire that slides across the road a low coefficient of friction with a tire that rolls across the road a low coefficient of friction with a tire that slides across the roadarrow_forwardA ski that is placed on snow will stick to the snow. However, when the ski is moved along the snow, the rubbing warms and partially melts the snow, reducing the coefficient of kinetic friction and promoting sliding. Waxing the ski makes it water repellent and reduces friction with the resulting layer of water. A magazine reports that a new type of plastic ski is especially water repellent and that, on a gentle 210 m slope in the Alps, a skier reduced his top-to-bottom time from 61.0 s with standard skis to 43.0 s with the new skis. Determine the magnitude of his average acceleration with (a) the standard skis and (b) the new skis. Assuming a 3.40° slope, compute the coefficient of kinetic friction for (c) the standard skis and (d) the new skis. (a) Number 0.113 Units m/s^2 (b) Number 0.227 Units m/s^2 (c) Number 0.276 Units This answer has no units (d) Number i Unitsarrow_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
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Newton's First Law of Motion: Mass and Inertia; Author: Professor Dave explains;https://www.youtube.com/watch?v=1XSyyjcEHo0;License: Standard YouTube License, CC-BY