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AB represents a uniform horizontal shelf of weight 30N which is at X and Y. Blocks are placed along the shelf, as shown in Figure 8.29. supported 30 cm 30 cm 120 cm 60 cm 2 kg 3 kg 5kg A 45 cm 135 cm Figure 8.29 l Find the reaction forces of the supports on the shelf at X and Y. In What is the greatest mass of an object which can be placed at D without the shelf tipping?

AB represents a uniform horizontal shelf of weight 30N which is at X and Y. Blocks are placed along the shelf, as shown in Figure 8.29. supported 30 cm 30 cm 120 cm 60 cm 2 kg 3 kg 5kg A 45 cm 135 cm Figure 8.29 l Find the reaction forces of the supports on the shelf at X and Y. In What is the greatest mass of an object which can be placed at D without the shelf tipping?

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
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hi can you please answer question 8 both parts

 

thank u so much

Oleksandr All Me 29/07/2021, 11:13 a.m. Introduction to moments O A uniform plank has length 6m and mass 40 kg. It is placed on horizontal ground at the edge of a vertical river bank, so that 1.5 m of the plank is projecting over the edge, as shown in Figure 8.27. 6m 1.5m Figure 8.27 How far can a man of mass 70 kg walk along the plank without tipping it? 6 Two young children of mass 30 kg and 35 kg sit at the ends of a see-saw Each child is 2.5 m from the fulcrum. Their father whose mass is 75 kg joins them. Where must he sit in order for the see-saw to balance? O A light rod, 2m long is hanging horizontally supported by vertical strings at each end. The maximum tension which the strings can exert is 80 N. A lamina is a flat object that has negligible thickness compared with its ength and width Along what range of positions on the rod is it safe to hang a 10kg mass, O A sign consists of a uniform rectangular lamina of weight 50 N. It is suspended in equilibrium in a vertical plane by vertical light chains attached to the sign at the points A and B, with AB horizontal, as shown in Figure 8.28. 0.45 m 0.15m A B. Figure 8.28 li) Draw a diagram showing all the forces acting on the sign. lii) Find the tensions in the chains. ® AB represents a uniform horizontal shelf of weight 30N which is supported at X and Y. Blocks are placed along the shelf, as shown in Figure 8.29. 30 cm 120 cm 30 cm 60 cm 2 kg 3 kg 5 kg A 45 cm 135 cm Figure 8.29 i) Find the reaction forces of the supports on the shelf at X and Y. li What is the greatest mass of an object which can be placed at D without the shelf tipping?
Transcribed Image Text:Oleksandr All Me 29/07/2021, 11:13 a.m. Introduction to moments O A uniform plank has length 6m and mass 40 kg. It is placed on horizontal ground at the edge of a vertical river bank, so that 1.5 m of the plank is projecting over the edge, as shown in Figure 8.27. 6m 1.5m Figure 8.27 How far can a man of mass 70 kg walk along the plank without tipping it? 6 Two young children of mass 30 kg and 35 kg sit at the ends of a see-saw Each child is 2.5 m from the fulcrum. Their father whose mass is 75 kg joins them. Where must he sit in order for the see-saw to balance? O A light rod, 2m long is hanging horizontally supported by vertical strings at each end. The maximum tension which the strings can exert is 80 N. A lamina is a flat object that has negligible thickness compared with its ength and width Along what range of positions on the rod is it safe to hang a 10kg mass, O A sign consists of a uniform rectangular lamina of weight 50 N. It is suspended in equilibrium in a vertical plane by vertical light chains attached to the sign at the points A and B, with AB horizontal, as shown in Figure 8.28. 0.45 m 0.15m A B. Figure 8.28 li) Draw a diagram showing all the forces acting on the sign. lii) Find the tensions in the chains. ® AB represents a uniform horizontal shelf of weight 30N which is supported at X and Y. Blocks are placed along the shelf, as shown in Figure 8.29. 30 cm 120 cm 30 cm 60 cm 2 kg 3 kg 5 kg A 45 cm 135 cm Figure 8.29 i) Find the reaction forces of the supports on the shelf at X and Y. li What is the greatest mass of an object which can be placed at D without the shelf tipping?
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