4th Edition

ISBN: 9780137574728

Author: Knight

Publisher: PEARSON

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Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.

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Textbook Question

Chapter 10, Problem 82GP

In an amusement park water slide, people slide down an essentially frictionless tube. The top of the slide is 3.0 m above the bottom where they exit the slide, moving horizontally, 1.2 m above a swimming pool. What horizontal distance do they travel from the exit point before hitting the water? does the mass of the person make any difference?

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Chapter 10, Problem 81GP

Chapter 10, Problem 83GP

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5.77 A block with mass m₁ is placed on an inclined plane with slope angle a and is connected to a hanging block with mass m₂ by a cord passing over a small, frictionless pulley (Fig. P5.74). The coef- ficient of static friction is μs, and the coefficient of kinetic friction is Mk. (a) Find the value of m₂ for which the block of mass m₁ moves up the plane at constant speed once it is set in motion. (b) Find the value of m2 for which the block of mass m₁ moves down the plane at constant speed once it is set in motion. (c) For what range of values of m₂ will the blocks remain at rest if they are released from rest?

5.78 .. DATA BIO The Flying Leap of a Flea. High-speed motion pictures (3500 frames/second) of a jumping 210 μg flea yielded the data to plot the flea's acceleration as a function of time, as shown in Fig. P5.78. (See "The Flying Leap of the Flea," by M. Rothschild et al., Scientific American, November 1973.) This flea was about 2 mm long and jumped at a nearly vertical takeoff angle. Using the graph, (a) find the initial net external force on the flea. How does it compare to the flea's weight? (b) Find the maximum net external force on this jump- ing flea. When does this maximum force occur? (c) Use the graph to find the flea's maximum speed. Figure P5.78 150 a/g 100 50 1.0 1.5 0.5 Time (ms)

5.4 ⚫ BIO Injuries to the Spinal Column. In the treatment of spine injuries, it is often necessary to provide tension along the spi- nal column to stretch the backbone. One device for doing this is the Stryker frame (Fig. E5.4a, next page). A weight W is attached to the patient (sometimes around a neck collar, Fig. E5.4b), and fric- tion between the person's body and the bed prevents sliding. (a) If the coefficient of static friction between a 78.5 kg patient's body and the bed is 0.75, what is the maximum traction force along the spi- nal column that W can provide without causing the patient to slide? (b) Under the conditions of maximum traction, what is the tension in each cable attached to the neck collar? Figure E5.4 (a) (b) W 65° 65°

Chapter 10 Solutions

COLLEGE PHYSICS:STRATEGIC APPR.AP ED.

Ch. 10 - Puck B has twice the mass of puck A. Starting from...Ch. 10 - To change a tire, you need to use a jack to raise...Ch. 10 - Prob. 15CQ Ch. 10 - A roller coaster car rolls down a frictionless...Ch. 10 - A spring gun shoots out a plastic ball at speed v....Ch. 10 - Prob. 19CQ Ch. 10 - Sandy and Chris stand on the edge of a cliff and...Ch. 10 - Prob. 21CQ Ch. 10 - Prob. 24CQ Ch. 10 - A roller coaster starts from rest at its highest...Ch. 10 - A woman uses a pulley and a rope to raise a 20 kg...Ch. 10 - A hockey puck sliding along frictionless ice with...Ch. 10 - A block slides down a smooth ramp, starting from...Ch. 10 - A wrecking ball is suspended from a 5.0-m-long...Ch. 10 - Prob. 30MCQ Ch. 10 - Prob. 31MCQ Ch. 10 - Prob. 1P Ch. 10 - The two ropes seen in Figure P10.2 are used to...Ch. 10 - The two ropes shown in the bird's-eye view of...Ch. 10 - Prob. 4P Ch. 10 - A boy flies a kite with the string at a 30 angle...Ch. 10 - Prob. 6P Ch. 10 - A crate slides down a ramp that makes a 20 angle...Ch. 10 - Prob. 8P Ch. 10 - At what speed does a 1000 kg compact car have the...Ch. 10 - Prob. 10P Ch. 10 - Prob. 11P Ch. 10 - Prob. 12P Ch. 10 - How fast would an 80 kg man need to run in order...Ch. 10 - Prob. 14P Ch. 10 - Sams job at the amusement park is to slow down and...Ch. 10 - Prob. 16P Ch. 10 - Prob. 17P Ch. 10 - Prob. 18P Ch. 10 - An energy storage system based on a flywheel (a...Ch. 10 - The lowest point in death Valley is 85.0 m below...Ch. 10 - The world's fastest humans can reach speeds of...Ch. 10 - A 72 kg bike racer climbs a 1200-m-long section of...Ch. 10 - A 1000 kg wrecking ball hangs from a 15-m-long...Ch. 10 - How far must you stretch a spring with k = 1000...Ch. 10 - How much energy can be stored in a spring with a...Ch. 10 - Prob. 26P Ch. 10 - The elastic energy stored in your tendons can...Ch. 10 - Prob. 28P Ch. 10 - Mark pushes his broken car 150 m down the block to...Ch. 10 - Prob. 30P Ch. 10 - A 900 N crate slides 12m down a ramp that makes an...Ch. 10 - Prob. 32P Ch. 10 - A 25 kg child slides down a playground slide at a...Ch. 10 - Prob. 34P Ch. 10 - A boy reaches out of a window and tosses a ball...Ch. 10 - Prob. 36P Ch. 10 - What minimum speed does a 100 g puck need to make...Ch. 10 - Prob. 38P Ch. 10 - Prob. 39P Ch. 10 - Prob. 40P Ch. 10 - A fireman of mass 80 kg slides down a pole. When...Ch. 10 - Prob. 42P Ch. 10 - Prob. 43P Ch. 10 - Prob. 44P Ch. 10 - In the winter activity of tubing, riders slide...Ch. 10 - Prob. 46P Ch. 10 - A cyclist is coasting at 12 m/s when she starts...Ch. 10 - Prob. 48P Ch. 10 - Prob. 49P Ch. 10 - Prob. 51P Ch. 10 - Prob. 52P Ch. 10 - Prob. 53P Ch. 10 - Prob. 54P Ch. 10 - A 50 g marble moving at 2.0 m/s strikes a 20 g...Ch. 10 - Ball 1, with a mass of 100 g and traveling at 10...Ch. 10 - Prob. 57P Ch. 10 - Two balls undergo a perfectly elastic head-on...Ch. 10 - Prob. 59P Ch. 10 - Prob. 61P Ch. 10 - Prob. 62P Ch. 10 - A 1000 kg sports car accelerates from 0 to 30m/sin...Ch. 10 - Prob. 64P Ch. 10 - An elite Tour de France cyclist can maintain an...Ch. 10 - Prob. 66P Ch. 10 - A 710 kg car drives at a constant speed of 23 m/s....Ch. 10 - Prob. 68P Ch. 10 - An elevator weighing 2500 N ascends at a constant...Ch. 10 - Prob. 70P Ch. 10 - A 550 kg elevator accelerates upward at 1.2 m/s2...Ch. 10 - Prob. 73GP Ch. 10 - Prob. 74GP Ch. 10 - Prob. 75GP Ch. 10 - You are driving your 1500 kg car at 20 m/s down a...Ch. 10 - Prob. 77GP Ch. 10 - Prob. 78GP Ch. 10 - Prob. 79GP Ch. 10 - Prob. 80GP Ch. 10 - The maximum energy a bone can absorb without...Ch. 10 - In an amusement park water slide, people slide...Ch. 10 - Prob. 83GP Ch. 10 - Prob. 84GP Ch. 10 - Two coupled boxcars are rolling along at 2.5 m/s...Ch. 10 - A 50 g ball of clay traveling at 6.5 m/s hits and...Ch. 10 - Prob. 87GP Ch. 10 - Prob. 88GP Ch. 10 - The mass of an elevator and its occupants is 1200...Ch. 10 - Tennis Ball Testing A tennis ball bouncing on a...Ch. 10 - Tennis Ball Testing A tennis ball bouncing on a...Ch. 10 - Tennis Ball Testing A tennis ball bouncing on a...Ch. 10 - Prob. 93MSPP Ch. 10 - Tennis Ball Testing A tennis ball bouncing on a...Ch. 10 - Work and Power in Cycling When you ride a bicycle...Ch. 10 - Work and Power in Cycling When you ride a bicycle...Ch. 10 - Work and Power in Cycling When you ride a bicycle...Ch. 10 - Work and Power in Cycling When you ride a bicycle...Ch. 10 - Work and Power in Cycling When you ride a bicycle...

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