Calculus 2 :

Chapter 7 Review: Problem 10 [1 point) Aspn'ng requires a force of 3 N to stretch to 20 cm beyond its original length. The amount of work required to stretch the spring to 40 cm beyond its original length is D A. None of these [J B. six times the amount of work needed to stretch the spring to 20 cm. [1 C. four times the amount of work needed to stretch The spring to 20 cm. [1 D. Mice the amount of work needed to stretch the spring to 20 cm. Chapter 7 Review: Problem 6 {1 point) Consider the region R1 bounded by y = x) and the :raxis in the interval [0,!3]. Let k be a positive constant and 1h bounded by y = k - x) and the Iexis in the interval [6,13]. If Vi is the volume of the solid obtained by revolving R1 about the zaxis, then the volume, V3 of the solid generated by revolving R2 about the zaxis satisIIes that DkK=E DEVI=F-Vg DCH=bE C] D. None ofthese. Chapter 7 Review: Problem 7 (1 point) Suppose that the region Ri is bounded by y = f(x) and y = g(x) in the first quadrant, and the region Ry is bounded by y = f(x) + 1 and y = g(x) + 1. Let V, be the volume of the solid obtained by rotating Ry about the r-axis and let V2 be the volume of the solid obtained by rotating R2 about the r-axis. Then, DA. V, V2Chapter 7 Review: Problem 8 (1 point) Set up but do not evaluate the integral that defines the arc length of of = cos(y) in the interval 0