Find the mass of a wire in the shape of a circle of radius 6 centered at (9, 8) with linear mass density p(x, y) = y².

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Find the mass of a wire in the shape of a circle of radius 6 centered at (9, 8) with linear mass density p(x, y) = y2.
Step 1 of 3
Recall that the mass of a wire with linear density p(x, y) is given by the line integral
P(x, y) ds =
P(r(t))||r'(t) || dt where r(t), a s t s b, is
a parameterization of C.
We begin by finding a parameterization of the given circle C. Recall that a circle centered at the origin with radius R can be parameterized by
(R cos(t), R sin(t)), o sts 2n. Shifting the circle so that the center is (h, k), we obtain (h + R cos(t), k + R sin(t)), osts 2n.
Thus, the given circle with center (9, 8) and radius 6 can be parameterized by the following. (Use the form given above.)
r(t) =
,0sts 2n
Transcribed Image Text:Find the mass of a wire in the shape of a circle of radius 6 centered at (9, 8) with linear mass density p(x, y) = y2. Step 1 of 3 Recall that the mass of a wire with linear density p(x, y) is given by the line integral P(x, y) ds = P(r(t))||r'(t) || dt where r(t), a s t s b, is a parameterization of C. We begin by finding a parameterization of the given circle C. Recall that a circle centered at the origin with radius R can be parameterized by (R cos(t), R sin(t)), o sts 2n. Shifting the circle so that the center is (h, k), we obtain (h + R cos(t), k + R sin(t)), osts 2n. Thus, the given circle with center (9, 8) and radius 6 can be parameterized by the following. (Use the form given above.) r(t) = ,0sts 2n
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