COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 29QAP
To determine
The numerical value of the coefficient of static friction between a car's tires and dry pavement
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Students have asked these similar questions
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?
A piece of bacon starts to slide down the pan when one side of a pan is raised up 5.0 cm. If the length of the pan from pivot to the raising point is 23.5 cm, what is the coefficient of static friction between the pan and the bacon?
Which statement about kinetic friction and static friction is true?
The force of kinetic friction changes if the speed of the object decreases.
The force of kinetic friction changes if the horizontal force (or forces) it opposes gets weaker.
The force of static friction changes if the speed of the object decreases
The force of static friction changes if the horizontal force (or forces) it opposes gets weaker.
Chapter 5 Solutions
COLLEGE PHYSICS
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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 crate remains stationary after it has been placed on a ramp inclined at an angle with the horizontal. Which of the following statements must be true about the magnitude of the frictional force that acts on the crate? (a) It is larger than the weight of the crate. (b) It is at least equal to the weight of the crate. (c) It is equal to sn. (d) It is greater than the component of the gravitational force acting down the ramp. (e) It is equal to the component of the gravitational force acting down the ramp.arrow_forwardWhy is the following situation impossible? Your 3.80-kg physics book is placed next to you on the horizontal seat of your car. The coefficient of static friction between the book and the seat is 0.650, and the coefficient of kinetic friction is 0.550. You are traveling forward at 72.0 km/h and brake to a stop with constant acceleration over a distance of 30.0 m. Your physics book remains on the seat rather than sliding forward onto the floor.arrow_forwardA woman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. The book has a mass of m = 1.7 kg and the coefficient of static friction between her hand and the book is μs = 0.59. Force minimum?arrow_forward
- A 3 kg box rests on a horizontal table. It is attached to a 2 kg box via a pulley. The 2 kg box hangs over the edge of the table. The 2 kg box is 2 meters from the ground. a) What is the minimum coefficient of static friction such that the objects remain at rest. b) If the coefficient of static friction is less than that in part (a) and the coefficient of kinetic friction between the box and the table is 0.30, find the time the 2 kg mass falls the 2 meters to the floor. Assume the system starts from rest.arrow_forwardThe lubrication of bone joints is a subject of ongoing medical research. Two bones connected at a joint do not touch. The bones are covered in articular cartilage, and are surrounded by lubricating synovial fluid. Rheumatoid arthritis results in overproduction of synovial fluid, swollen joints, and difficult and painful movement. Other joint disorders degrade the synovial fluid, directly increasing the friction between the bones, resulting in painful motion. The horizontal force F⃗h would rotate the femur head clockwise in the hip socket, but the frictional force f⃗f acts to prevent this clockwise rotation. The apparatus is designed such that when |F⃗h| > |f⃗f|, the femur head rotates clockwise. A sample of data collected at impending slippage of the femur is shown in the figure.(Figure 1). Based on these data, what is the approximate coefficient of static friction μs between the femur head and the hip socket? Enter your answer numerically to one significant figure.arrow_forwardA book of mass 9 kg rests on a plank. You tilt one end of the plank and slowly increase the angle of the tilt. The coefficient of static friction between the book and the plank is 0.48. What is the maximum angle of tilt for which the book will remain stationary and not slide down the plank?arrow_forward
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- A fishnet consists of 1 mm diameter strings which form a pattern of 1 cm x 1 cm squares. Estimate the drag to pull a square meter of net at 3 m/s normal to its plane. Treat each string as independent from the others 926 N O 1500 N 300 M 400 Narrow_forwardYou can hold your 2.5 kg textbook against the wall, preventing it from slipping down, if you press your hand against it horizontally. Suppose the coefficient of static friction between the book and the wall is 0.50, and there is no friction between your hand and the book. What minimum force do you need to apply to keep the book from slipping down?arrow_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
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