![]() ![]() (a) Determine the angle by trigonometry knowing that the component along line a-a is to be 240 lb. 7 PROBLEM 2.5 The 300-lb force is to be resolved into components along lines a-a and b-b. If you are a student using this Manual, you are using it without permission. No part of this Manual may be displayed, reproduced or distributed in any form or by any means, without the prior written permission of the publisher, or used beyond the limited distribution to teachers and educators permitted by McGraw-Hill for their individual course preparation. SOLUTION (a) Parallelogram law: (b) Triangle rule: We measure: 3.30 kN, 66.6R = 3.30 kN=R 66.6 W 5. Determine graphically the magnitude and direction of their resultant using (a) the parallelogram law, (b) the triangle rule. 6 PROBLEM 2.4 Two forces are applied at Point B of beam AB. Knowing that the tension is 120 lb in AB and 40 lb in AD, determine graphically the magnitude and direction of the resultant of the forces exerted by the stays at A using (a) the parallelogram law, (b) the triangle rule. 5 PROBLEM 2.3 The cable stays AB and AD help support pole AC. SOLUTION (a) Parallelogram law: (b) Triangle rule: We measure: 77.1lb, 85.4R = 77.1lb=R 85.4 W 3. Knowing that P 60 lb= and 25 lb,Q = determine graphically the magnitude and direction of their resultant using (a) the parallelogram law, (b) the triangle rule. 4 PROBLEM 2.2 Two forces P and Q are applied as shown at Point A of a hook support. SOLUTION (a) Parallelogram law: (b) Triangle rule: We measure: 179 N, 75.1R = 179 N=R 75.1 WĢ. Knowing that P 75 N= and 125 N,Q = determine graphically the magnitude and direction of their resultant using (a) the parallelogram law, (b) the triangle rule. 3 PROBLEM 2.1 Two forces P and Q are applied as shown at Point A of a hook support. ![]()
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