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11th Edition

Ron Larson + 1 other

Publisher: Cengage Learning

ISBN: 9781337275347

Chapter 7.5, Problem 34E

Textbook Problem

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Lifting a Chain In Exercises 33 and 34, consider a 15-foot hanging chain that weighs 3 pounds per foot. Find the work done in lifting the chain vertically to the indicated position.

Repeat Exercise 33 raising the bottom of the chain to the 12-foot level.

Expert Solution

To determine

**To calculate:** Work done in taking the bottom of the chain and raising it to the 12-foot-level.

**Given:** Length of the chain is 15 foot which weighs 3 pounds per foot.

**Formula used:**

Work done by a variable force is given by:

**Calculation:**

Let us consider that the chain is divided into small sections, each of length

Now, when the bottom of the chain is at 12-foot level, the distance travelled by bottom of the chain is

As a typical section (initially on the ground) is raised to a height of *y*, the increment of work is:

Now, since the top end is still at 15-foot level and the bottom end is at 12-foot level, leave the chain doubled till 12-foot point

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The centroid of the plane...Ch. 7.6 - Centroid of a Common Region In Exercises 45-50,...Ch. 7.6 - Centroid of a Common Region In Exercises 45-50,...Ch. 7.6 - Centroid of a Common Region In Exercises 45-50,...Ch. 7.6 - Centroid of a Common Region In Exercises 45-50,...Ch. 7.6 - Centroid of a Common Region In Exercises 45-50,...Ch. 7.6 - Centroid of a Common Region In Exercises 45-50,...Ch. 7.6 - Graphical Reasoning Consider the region bounded by...Ch. 7.6 - Graphical and Numerical Reasoning Consider the...Ch. 7.6 - Modeling Data The manufacturer of glass for a...Ch. 7.6 - Modeling Data The manufacturer of a boat needs...Ch. 7.6 - Second Theorem of Pappus In Exercises 55 and 56,...Ch. 7.6 - Second Theorem of Pappus In Exercises 55 and 56,...Ch. 7.6 - Finding a Centroid Let n1 be constant, and...Ch. 7.6 - Finding a Centroid Consider the functions...Ch. 7.6 - PUTNAM EXAM CHALLENGE Let V be the region in the...Ch. 7.7 - CONCEPT CHECK Fluid Pressure Describe fluid...Ch. 7.7 - CONCEPT CHECK Fluid Pressure Docs fluid pressure...Ch. 7.7 - Force on a Submerged Sheet In Exercises 3-6, the...Ch. 7.7 - Force on a Submerged Sheet In Exercises 36, the...Ch. 7.7 - Force on a Submerged Sheet In Exercises 36, the...Ch. 7.7 - Force on a Submerged Sheet In Exercises 36, the...Ch. 7.7 - Force on a Submerged Sheet In Exercises 7 and 8,...Ch. 7.7 - Force on a Submerged Sheet In Exercises 7 and 8,...Ch. 7.7 - Fluid Force on a Tank Wall In Exercises 9-14, find...Ch. 7.7 - Fluid Force on a Tank Wall In Exercises 914, find...Ch. 7.7 - Fluid Force on a Tank Wall In Exercises 914, find...Ch. 7.7 - Fluid Force on a Tank Wall In Exercises 914, find...Ch. 7.7 - Fluid Force on a Tank Wall In Exercises 914, find...Ch. 7.7 - Fluid Force on a Tank Wall In Exercises 914, find...Ch. 7.7 - Fluid Force of a Water In Exercises 15-18, find...Ch. 7.7 - Fluid Force of Water In Exercises 15-18, find the...Ch. 7.7 - Fluid Force of Water In Exercises 1518, find the...Ch. 7.7 - Fluid Force of Water In Exercises 1518, find the...Ch. 7.7 - Force on a Concrete Form In Exercises 19-22, the...Ch. 7.7 - Force on a Concrete formIn Exercises 1922, the...Ch. 7.7 - Force on a Concrete Form In Exercises 19-22, the...Ch. 7.7 - Force on a Concrete Form In Exercises 19-22, the...Ch. 7.7 - Fluid Force of Gasoline A cylindrical gasoline...Ch. 7.7 - Fluid Force of Gasoline Repeat Exercise 23 for a...Ch. 7.7 - EXPLORING CONCEPTS Fluid Pressure Explain why...Ch. 7.7 - EXPLORING CONCEPTS Buoyant Force Buoyant force is...Ch. 7.7 - EXPLORING CONCEPTS Think About It Approximate the...Ch. 7.7 - HOW DO YOU SEE IT? Two identical semicircular...Ch. 7.7 - Fluid Force on a Circular Plate A circular plate...Ch. 7.7 - Fluid Force on a Circular Plate Use the result of...Ch. 7.7 - Fluid Force on a Rectangular Plate A rectangular...Ch. 7.7 - Fluid Force on a Rectangular Plate Use the result...Ch. 7.7 - Submarine Porthole A square porthole on a vertical...Ch. 7.7 - Submarine Pothole Repeat Exercise 33 for a...Ch. 7.7 - Modeling Data The vertical stern of a boat...Ch. 7.7 - Irrigation Canal Gate The vertical cross section...Ch. 7 - Finding the Area of a RegionIn Exercises 110,...Ch. 7 - Finding the Area of a RegionIn Exercises 1-10,...Ch. 7 - Finding the Area of a RegionIn Exercises 1-10,...Ch. 7 - Finding the Area of a RegionIn Exercises 1-10,...Ch. 7 - Finding the Area of a RegionIn Exercises 1-10,...Ch. 7 - Finding the Area of a RegionIn Exercises 1-10,...Ch. 7 - Finding the Area of a RegionIn Exercises 1-10,...Ch. 7 - Finding the Area of a RegionIn Exercises 1-10,...Ch. 7 - Finding the Area of a Region In Exercises 1-10,...Ch. 7 - Finding the Area of a RegionIn Exercises 1-10,...Ch. 7 - Finding the Area of a Region In Exercises 11-14,...Ch. 7 - Finding the Area of a Region In Exercises 11-14,...Ch. 7 - Finding the Area of a RegionIn Exercises 11-14,...Ch. 7 - Finding the Area of a RegionIn Exercises 11-14,...Ch. 7 - Integration as an Accumulation Process In...Ch. 7 - Integration as an Accumulation Process In...Ch. 7 - Revenue In Exercises 17 and 18, two models R1 and...Ch. 7 - Revenue In Exercises 17 and 18, two models R1 and...Ch. 7 - Finding the Volume of a Solid In Exercises 19 and...Ch. 7 - Finding the Volume of a Solid In Exercises 19 and...Ch. 7 - Finding the Volume of a Solid In Exercises 21 and...Ch. 7 - Finding the Volume of a Solid In Exercises 21 and...Ch. 7 - Finding the Volume of a Solid In Exercises 23 and...Ch. 7 - Finding the Volume of a Solid In Exercises 23 and...Ch. 7 - Gasoline Tank A gasoline tank is an oblate...Ch. 7 - Using Cross Sections Find the volume of the solid...Ch. 7 - Finding Arc Length In Exercises 27 and 28, find...Ch. 7 - Finding Arc Length In Exercises 27 and 28, find...Ch. 7 - Finding the Area of a Surface of Revolution In...Ch. 7 - Finding the Area of a Surface of Revolution In...Ch. 7 - Finding the Area of a Surface of Revolution In...Ch. 7 - Finding the Area of a Surface of Revolution In...Ch. 7 - Hooke's Law A force of 5 pounds stretches a spring...Ch. 7 - Hooke's Law A force of 50 pounds stretches a...Ch. 7 - Propulsion Neglecting air resistance and the...Ch. 7 - Pumping Water A water well has an 8-inch diameter...Ch. 7 - Winding a Chain A chain 10 feet long weighs 4...Ch. 7 - Winding a Cable A 200-foot cable weighing 5 pounds...Ch. 7 - Boyles Law A quantity of gas with an initial...Ch. 7 - Boyles Law A quantity of gas with an initial...Ch. 7 - Center of Mass of a Linear System Find the center...Ch. 7 - Center of Mass of a Two-Dimensional System Find...Ch. 7 - Center of Mass of a Planar Lamina In Exercises 43...Ch. 7 - Center of Mass of a Planar Lamina In Exercises 43...Ch. 7 - Finding the Center of Mass Introduce an...Ch. 7 - Finding Volume Use the Theorem of Pappus to find...Ch. 7 - Force on a Submerged Sheet In Exercises 47 and 48,...Ch. 7 - Force on a Submerged Sheet In Exercises 47 and 48,...Ch. 7 - Fluid Force of Seawater Find the fluid force on...Ch. 7 - Force on a Concrete Form The vertical side of a...Ch. 7 - Submarine Porthole A circular porthole on a...Ch. 7 - Finding a Limit Let R be the area of the region in...Ch. 7 - Center of Mass of a Lamina Let L be the lamina of...Ch. 7 - Dividing a Region Let R be the region bounded by...Ch. 7 - Surface Area Graph the curve 8y2=x2(1x2) Use a...Ch. 7 - Centroid A blade on an industrial fan has the...Ch. 7 - Volume A blade is cut through the center of a...Ch. 7 - Volume A rectangle R of length l and width w is...Ch. 7 - Comparing Areas of Regions (a) The tangent line to...Ch. 7 - Using Arc Length The graph of y=f(x) passes...Ch. 7 - Using a Function Let f be rectifiable on the...Ch. 7 - Archimedes' Principle Archimedes' Principle states...Ch. 7 - Finding a Centroid Sketch the region bounded on...Ch. 7 - Finding a Centroid Sketch the region bounded on...Ch. 7 - Work Find the work done by each force F.Ch. 7 - Consumer and Producer Surplus In Exercises 15 and...Ch. 7 - Consumer and Producer Surplus In Exercises 15 and...Ch. 7 - Fluid Force A swimming pool is 20 feet wide, 40...

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