Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN: 9781305116399
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 6, Problem 6.2QQ
A bead slides at constant speed along a curved wire lying on a horizontal surface as shown in Figure 6.8. (a) Draw the vectors representing the force exerted by the wire on the bead at points Ⓐ, Ⓑ,and Ⓒ. (b) Suppose the bead in Figure 6.8 speeds up with constant tangential acceleration as it moves toward the right. Draw the vectors representing the forces on the bead at points Ⓐ, Ⓑ,and Ⓒ.
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A long straight wire and a rectangular loop lie in the same plane, as shown in the the figure above, where 11 = 6 A, 12 = 4 A, a = 15 cm, b =
30 cm, c = 30 cm. Find the net force on the loop due to the long wire.
N (positive if to the right)
Hint: Force on top side and force on bottom side cancel out.
A dancer is standing on one leg on a drawbridge that is about to open. The coefficients of static and kinetic friction between the drawbridge and the dancer's foot are μs and μk, respectively. n⃗ represents the normal force exerted on the dancer by the bridge, and F⃗g represents the gravitational force exerted on the dancer, as shown in the drawing.(Figure 1). For all the questions, we can assume that the bridge is a perfectly flat surface and lacks the curvature characteristic of most bridges.
Before the drawbridge starts to open, it is perfectly level with the ground. The dancer is standing still on one leg. What is the horizontal component of the friction force f⃗? (Express your answer in terms of some or all of the variables n, μs, and/or μk.)
(Figure 2). The drawbridge then starts to rise. The dancer continues to stand on one leg. The drawbridge stops just at the point where the dancer is on the verge of slipping. What is the magnitude f of the frictional force now? (Express…
Problem 10 : A cord connected at one end to a block which can slide on an inclined plane has its other end wrapped around a cylinder resting in a depression at the top of the plane as shown in (Figure 1).
Part A
Determine the speed of the block after it has traveled 1.30 m along the plane, starting from rest. Assume there is no friction.
Express your answer using two significant figures.
Part B
Determine the speed of the block after it has traveled 1.30 m along the plane, starting from rest. Assume the coefficient of friction between all surfaces is μ = 0.0280. Since the block is much lighter than the cylinder, ignore tension in the string when calculating the normal force on the cylinder.
Do not ignore tension in the string when calculating the net torque (including friction) on the cylinder.
Chapter 6 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
Ch. 6 - You are riding on a Ferris wheel that is rotating...Ch. 6 - A bead slides at constant speed along a curved...Ch. 6 - Consider the passenger in the car making a left...Ch. 6 - A basketball and a 2-inch-diameter steel ball,...Ch. 6 - A child is practicing for a BMX race. His speed...Ch. 6 - Consider a skydive r who has stepped from a...Ch. 6 - A door in a hospital has a pneumatic closer that...Ch. 6 - A pendulum consists of a small object called a bob...Ch. 6 - As a raindrop falls through the atmosphere, its...Ch. 6 - An office door is given a sharp push and swings...
Ch. 6 - Before takeoff on an airplane, an inquisitive...Ch. 6 - What forces cause (a) an automobile, (b) a...Ch. 6 - A falling skydiver reaches terminal speed with her...Ch. 6 - An object executes circular motion with constant...Ch. 6 - Describe the path of a moving body in the event...Ch. 6 - The observer in the accelerating elevator of...Ch. 6 - Prob. 6.6CQCh. 6 - It has been suggested dial rotating cylinders...Ch. 6 - Consider a small raindrop and a large raindrop...Ch. 6 - Why does a pilot lend to black out when pulling...Ch. 6 - Prob. 6.10CQCh. 6 - If the current position and velocity of every...Ch. 6 - A light string can support a stationary hanging...Ch. 6 - Whenever two Apollo astronauts were on the surface...Ch. 6 - In the Bohr model of the hydrogen atom, an...Ch. 6 - A curve in a road forms part of a horizontal...Ch. 6 - In a cyclotron (one type of particle accelerator),...Ch. 6 - A car initially traveling eastward turns north by...Ch. 6 - A space station, in the form of a wheel 120 m in...Ch. 6 - Consider a conical pendulum (Fig. P6.8) with a bob...Ch. 6 - A coin placed 30.0 cm from the center of a...Ch. 6 - Why is the following situation impossible? The...Ch. 6 - A crate of eggs is located in the middle of the...Ch. 6 - A pail of water is rotated in a vertical circle of...Ch. 6 - A hawk flies in a horizontal arc of radius 12.0 m...Ch. 6 - A 40.0-kg child swings in a swing supported by two...Ch. 6 - A child of mass m swings in a swing supported by...Ch. 6 - A roller-coaster car (Fig. P6.16) has a mass of...Ch. 6 - A roller coaster at the Six Flags Great America...Ch. 6 - One end of a cord is fixed and a small 0.500-kg...Ch. 6 - Prob. 6.19PCh. 6 - An object of mass m = 5.00 kg, attached to a...Ch. 6 - All object of mass m = 500 kg is suspended from...Ch. 6 - A child lying on her back experiences 55.0 N...Ch. 6 - A person stands on a scale in an elevator. As the...Ch. 6 - Review. A student, along with her backpack on the...Ch. 6 - A small container of water is placed on a...Ch. 6 - Review. (a) Estimate the terminal speed of a...Ch. 6 - The mass of a sports car is 1 200 kg. The shape of...Ch. 6 - A skydiver of mass 80.0 kg jumps from a...Ch. 6 - Calculate the force required to pull a copper ball...Ch. 6 - A small piece of Styrofoam packing material is...Ch. 6 - Prob. 6.31PCh. 6 - Prob. 6.32PCh. 6 - Assume the resistive force acting on a speed...Ch. 6 - Review. A window washer pulls a rubber squeegee...Ch. 6 - A motorboat cuts its engine when its speed is 10.0...Ch. 6 - You can feel a force of air drag on your hand if...Ch. 6 - A car travels clockwise at constant speed around a...Ch. 6 - The mass of a roller-coaster car, including its...Ch. 6 - A string under a tension of 50.0 N is used to...Ch. 6 - Disturbed by speeding cars outside his workplace,...Ch. 6 - A car of mass m passes over a hump in a road that...Ch. 6 - A childs toy consists of a small wedge that has an...Ch. 6 - A seaplane of total mass m lands on a lake with...Ch. 6 - An object of mass m1 = 4.00 kg is tied to an...Ch. 6 - A ball of mass m = 0.275 kg swings in a vertical...Ch. 6 - Why is the following situation impossible? A...Ch. 6 - (a) A luggage carousel at an airport has the form...Ch. 6 - In a home laundry dryer, a cylindrical tub...Ch. 6 - Prob. 6.49APCh. 6 - A basin surrounding a drain has the shape of a...Ch. 6 - A truck is moving with constant acceleration a up...Ch. 6 - The pilot of an airplane executes a loop-the-loop...Ch. 6 - Review. While learning to drive, you arc in a 1...Ch. 6 - A puck of mass m1 is tied to a string and allowed...Ch. 6 - Because the Earth rotates about its axis, a point...Ch. 6 - Galileo thought about whether acceleration should...Ch. 6 - Figure P6.57 shows a photo of a swing a ride at an...Ch. 6 - Review. A piece of putty is initially located at...Ch. 6 - An amusement park ride consists of a large...Ch. 6 - Members of a skydiving club were given the...Ch. 6 - A car rounds a banked curve as discussed in...Ch. 6 - In Example 6.5, we investigated the forces a child...Ch. 6 - A model airplane of mass 0.750 kg flies with a...Ch. 6 - A student builds and calibrates an accelerometer...Ch. 6 - A 9.00-kg object starting from rest falls through...Ch. 6 - For t 0, an object of mass m experiences no force...Ch. 6 - A golfer tees off from a location precisely at i =...Ch. 6 - A single bead can slide with negligible friction...Ch. 6 - Prob. 6.69CPCh. 6 - Because of the Earths rotation, a plumb bob does...
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- A skate park is formed by two semicircles of radius R1 = 8.3 m and R2 = 1.0 m and a flat central part, as shown in the following figure. The flat part has a length L = 3.6 m. The semicircles are tangent to the horizontal in B and C and to the vertical in A and D. There is no friction in the curved parts and in the flat part the coefficient of kinetic friction is μC = 0.2. A block with mass m = 3.2 kg is dropped from A. Suppose the acceleration due to gravity is 9.8 m / s2. What is the magnitude of the velocity of the block as it passes through point B the second time? Choose one: a. 45,4 m/sb. None of the other alternatives.c. 22,7 m/sd. 11,6 m/se. 12,0 m/sf. 5,7 m/sg. 7,6 m/sh. 129,0 m/sarrow_forwardA 500 N F force is applied to the vertical rod, as shown in picture below. Write F as a function of the unit vectors i and j, and identify their vector and scalar components.arrow_forwardTo determine Cartesian force components from the magnitude and determine the position and resultant vectors by summing Cartesian components. As shown, a 3.1-lb ball is suspended at point D inside a box with dimensions w=9.50 ft, d=6.70 ft, and h=4.10 ft. The ball is held in place by three cables anchored at points A, B, and C on the surface of the box. If point D is the origin of the Cartesian coordinate system, point A is located at (−4.60,−3.50,2.50) ft, point B is located at (2.10,−3.50,1.90) ft, and point C is located at (2.10,6.00,−1.60) ft. 1) The tension in cable DA has a magnitude of TDA=7.66 lb. Find the Cartesian components of tension TDA, which is directed from D to A. so TDA=? 2)If the tensions in cables DA and DB are TDA=7.66 lb and TDB=5.56 lb, respectively, what is the tension in cable DC? so TDC=?arrow_forward
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