67–72 - Equilibrium of Forces The forces F,, F,. . .., F,acting at the same point P are said to be in equilibrium if theresultant force is zero, that is, if F, + F, + ...+ F, = 0. Find(a) the resultant forces acting at P, and (b) the additional forcerequired (if any) for the forces to be in equilibrium.67. F, = (2, 5), F; = (3, -8)68. F, = (3, –7), F2 = (4, -2), F; = (-7,9)69. F, = 4i – j, F; = 3i – 7j, F; = -8i + 3j.F, = i +j70. F, = i - j. F, = i + j, F; = -2i + j71.yF,10,860°30°20°F,72.42+3

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Algebra and Trigonometry (MindTap Course List)

4th Edition

ISBN:9781305071742

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter9: Vectors In Two And Three Dimensions

Section9.1: Vectors In Two Dimensions

Problem 68E

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