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3. Three kids stand on a see-saw as shown. The see-saw has a uniform cross section and weighs 10 lb, while kids A, B, and C weigh 30 lb, 40 lb, and 20 lb, respectively. Determine the weight of the rock at point E required for the system to maintain a perfect balance, and the reaction at support D. Write your answers using 3 significant digits. В A C k 1 ft * 1 ft ** 7.5 ft 0.5 ft

3. Three kids stand on a see-saw as shown. The see-saw has a uniform cross section and weighs 10 lb, while kids A, B, and C weigh 30 lb, 40 lb, and 20 lb, respectively. Determine the weight of the rock at point E required for the system to maintain a perfect balance, and the reaction at support D. Write your answers using 3 significant digits. В A C k 1 ft * 1 ft ** 7.5 ft 0.5 ft

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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3. Three kids stand on a see-saw as shown. The see-saw has a uniform cross section and weighs 10 lb, while kids A, B, and C weigh 30 lb, 40 lb, and 20 lb, respectively. Determine the weight of the rock at point E required for the system to maintain a perfect balance, and the reaction at support D. Write your answers using 3 significant digits. В A C k1 ft * 1 ft ** 7.5 ft 0.5 ft
Transcribed Image Text:3. Three kids stand on a see-saw as shown. The see-saw has a uniform cross section and weighs 10 lb, while kids A, B, and C weigh 30 lb, 40 lb, and 20 lb, respectively. Determine the weight of the rock at point E required for the system to maintain a perfect balance, and the reaction at support D. Write your answers using 3 significant digits. В A C k1 ft * 1 ft ** 7.5 ft 0.5 ft
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mass d is listed as 10 however you made it zero for equillibrium i think thats wrong but i might be wrong who knows.

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