[5-7 Find the ratio of width 6 and height h, which is a rectangular cross-section having the maximum section modulus from a circular cross-section with a diameter of 4 as shown in [Fig. 5-31].
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- Find the change in length between the points A and D on the bar given in the figure E= 4.10 5kN/cm2! How to compute the strain displacement matrix for each element?Aluminum Rod#1 has a length L and a diameter d. Aluminum Rod#2 has a length 2L and a diameter 2d. If Rod#1 is under tension T and Rod#2 is under tension 2T, how do the changes in length of the two rods compare?
- 2. Load-bearing part, as shown in Figure 2.1, find 2.1 Reaction force acting on points A and B 2.2 Then Panyasil recommends to modify the additional section as shown in Figure 2.2 to reduce the reaction force on point B can be reduced. Do students think that Panyasilp's statement is correct (Photo 2.1,2.2 L1=120mm L2=150mm)The boom has a negligible weight, but has sufficient strength to support the 1000N load. Find the force in the boomBC. Refer to Figure d. a. 1577.50N c. 1154.70N b. 2,000N d. 577.35Nꜱᴜᴘᴇʀᴄʜᴀʀɢᴇᴅ 6-ᴄʏʟɪɴᴅᴇʀ, 4-ꜱᴛʀᴏᴋᴇ ᴅɪᴇꜱᴇʟ ᴇɴɢɪɴᴇ ᴏꜰ 10.48-ᴄᴍ ʙᴏʀᴇ ᴀɴᴅ 12.7-ᴄᴍ ꜱᴛʀᴏᴋᴇ ʜᴀꜱ ᴀ ᴄᴏᴍᴘʀᴇꜱꜱɪᴏɴ ʀᴀᴛɪᴏ ᴏꜰ 15. ᴡʜᴇɴ ɪᴛ ɪꜱ ᴛᴇꜱᴛᴇᴅ ᴏɴ ᴀ ᴅʏɴᴀᴍᴏᴍᴇᴛᴇʀ ᴡɪᴛʜ ᴀ 53.34-ᴄᴍ ᴀʀᴍ ᴀᴛ 2500 ʀᴘᴍ, ᴛʜᴇ ꜱᴄᴀʟᴇ ʀᴇᴀᴅꜱ 81.65 ᴋɢ, ᴀ ᴛᴏᴛᴀʟ ᴏꜰ 2.86 ᴋɢ ᴏꜰ ꜰᴜᴇʟ ᴡɪᴛʜ 45,822.20 ᴋᴊ/ᴋɢ ʜᴇᴀᴛɪɴɢ ᴠᴀʟᴜᴇ ᴀʀᴇ ʙᴜʀɴᴇᴅ ᴅᴜʀɪɴɢ ᴀ 6-ᴍɪɴᴜᴛᴇ ᴛᴇꜱᴛ ᴀɴᴅ ᴀɪʀ ᴍᴇᴛᴇʀᴇᴅ ᴛᴏ ᴛʜᴇ ᴄʏʟɪɴᴅᴇʀꜱ ᴀᴛ ᴛʜᴇ ʀᴀᴛᴇ ᴏꜰ 0.182 ᴋɢ/ꜱ. ᴄᴀʟᴄᴜʟᴀᴛᴇ ᴛʜᴇ ᴘɪꜱᴛᴏɴ ꜱᴘᴇᴇᴅ ɪɴ ᴍ/ꜱ, ᴛʜᴇ ᴇɴɢɪɴᴇ ᴅɪꜱᴘʟᴀᴄᴇᴍᴇɴᴛ ɪɴ ᴍ3/ꜱ, ᴀɴᴅ ᴛʜᴇ ʙʀᴀᴋᴇ ᴛʜᴇʀᴍᴀʟ ᴇꜰꜰɪᴄɪᴇɴᴄʏ ɪɴ %.
- A sign for a pizza restaurant hangs from a 2.60-m long rod extended out from a building. A cable, attached to the building, is attached to the rod at a point that is 2.10 m from the hidge. (See the figure.)The mass of the rod is 5.90 kg. The mass of the sign is 9.40 kg. The angle between the building and the rod is 74.0 degrees. The angle between the cable and the horizontal is 31.0 degrees.What is the torque on the rod due to the weight of the rod alone? [Take the axis to be at the hinge.]If an isotropic material has a Young's modulus of 120 Gpa and a Poisson's ratio of 0.3, calculate its shear modulus. Select one: O G= 25 Gpa O G= 46 Gpa O G = 77 Gpa O G= 39 Gpa O G= 29 GpaConsidering Figure 20-8 (textbook), the torsion geometry parameter, Jw, for case 6 when b=6 and d=9 is most likely: 60.8 283.5 400.5 386.0 184.1 562.5 279.0 572.6 392.6