• Mechanically speaking, an oar is a beam, loaded in bending. • It must be strong enough to carry the bending moment exerted by the oarsman without breaking. • t must have just the right stiffness to match the rower's own characteristics and give the right 'feel'. • The most important, it must be as light as possible. Handle Collar Sleeve Spoon The oar stiffness is measured: • a 10 kg weight is hung on the oar, 2.05 m from the collar and the Loom deflection at this point is measured. • A soft oar will deflect nearly 50 mm; a hard one only 30. • A rower, ordering an oar, will specify how 'hard' it should be. QUESTION 1. Find material choice 2. Should we change the cross-section from the circular shape to the rectangular shape in order to increase the bending stiffness?

• Mechanically speaking, an oar is a beam, loaded in bending. • It must be strong enough to carry the bending moment exerted by the oarsman without breaking. • t must have just the right stiffness to match the rower's own characteristics and give the right 'feel'. • The most important, it must be as light as possible. Handle Collar Sleeve Spoon The oar stiffness is measured: • a 10 kg weight is hung on the oar, 2.05 m from the collar and the Loom deflection at this point is measured. • A soft oar will deflect nearly 50 mm; a hard one only 30. • A rower, ordering an oar, will specify how 'hard' it should be. QUESTION 1. Find material choice 2. Should we change the cross-section from the circular shape to the rectangular shape in order to increase the bending stiffness?

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

See similar textbooks

Similar questions

c) A 10,000 ft string of 7 in., 26 Ibs/ft L80 casing is run in a hole filled with 12 Ibs/gal mud. The string is equipped with a float shoe. Calculate the following: i. Hook load of an empty closed-end casing string in mud. ii. Hook load of a mud-filled string in mud. iii. Hook load of 16 ppg cement-filled string in mud.
Consider the beam shown in (Eigure 1). Suppose that w=360 N/m Figure Ⓒ1of1> 1 of 1 -3m Express your answer to three significant figures and include the appropriate units ▸ View Available Hint(s) F = 675 N Previous Answers ✓ Correct Correct answer is shown. Your answer 674 N was either rounded differently or used a different number of significant figures than required for this part Here we learn how to find a reaction force on a beam at a rocker on an inclined surface caused by an external distributed loading, using equations of equilibrium Part B Determine the and y components of reaction at I using scalar notation Express your answers in newtons to three significant figures separated by a comma. ▸ View Available Hint(s) VAX vec B..B,- 405,540 Submit Previous Answers Incorrect; Try Again; 3 attempts remaining N
a) The factors of safety predicted at point H by the maximum shear stress theory of failure (Tresca criterion) i) The second moment of area relative to z-axis, I_z, for the cross-section can be calculated as ( Enter your answer in cm4 ii) The bending stress at Point H can be calculated as (Enter your answer in MPa, Compressive stress is negative and tensile stress is positive) iii) The first moment of area required to calculate shear stress at H can be calculated as (Enter your answer in mm^3) iv) The absolute value of the transverse shear stress at point H can be calculated as (Enter your answer in MPa ) v) Maximum principal stress can be calculated as (Enter your answer in MPa ) vi) Minimum principal stress can be calculated as (Enter your answer in MPa ) vii) The equivalent stress for Maximum-Shear-Stress Theory ( Tresca criterion) (Enter your answer in MPa ) b) The von Mises equivalent stresses at point H can be calculated as: MPa c) The factors of safety at point H…
In order to determine the magnitude of the internal forces, a FBD must be cut. It is difficult to determine where a cut should be made in order to reveal the Maximum Internal Forces, thus we have put the distance to the cut in terms of 'x', and plot the equation. In my lecture we took a generic portion of a Beam and applied equilibrium and saw that Loading, Shear and Moment are related to each through differential equations. Change in Shear is the Area under the Loading diagram. Change in Moment is the Area under the Shear Diagram. Using Graphic Integration draw the shear and moment diagrams for the given beams and loading.
In the following cantilevered beam impact configuration pictured in Fig. 1, Determine: 1. The value of the equivalent spring K. 2. The values of the maximum impact force Fmax for weight heights ranging between h = 0 to 2 m. 3. Plot the maximum impact force Fmax as a function of the weight height h. 4. Plot the maximum force Fmax versus the maximum spring displacement Smaxwhen the weight height varies between h = 0 to 2 m. The beam has a resctangular cross section area. E = 70 GPa a = 10 cm b = 2 cm L = 1 m M = 5 kg g= 9.81 m/s² b of tat M h = 0-2 m K L Fig. 1 Cantilevered beam
REVIEW OF STRENGTH OF MATERIALS 6-in D. 300 lbf 50 Ibf 75 lbf 450lbf D 9 in D.C 6 in 8 in B 8 in For the loading shown, the force which makes the shaft to bend is the sum of the belt pulls. The force which makes the shaft to rotate is the difference between the two belt pulls. At any given point, find the Resultant moment by the Pythagorean theorem MRes = M + My *** The Direction of the Resultant Moment is e = tan Mxy ** -1 To be done: (a) Draw the Shear and Moment Diagram on the xz and on the xy planes. Solve for the resultant moments at points B, and C. (b) Find the location where the Resultant moment is maximum. (c) Find the maximum Bending Moment and its location.
Fast pls solve this question correctly in 5 min pls I will give u like for sure Class: Structures 1 Question: locate the centroid of the box section shown, a cross-section often used in bridge construction Answers: Ax=0 Ay=3.92 kn By=11.08 kn Sub.
1- Where the Hook's law state in elastic limit or plastic limit? 2- Ductile materials elongate 3- Give two example of ferrous metal. 4- Mechanical properties of metals are those properties which completely define its behavior under the action of.. 5- What is the resilience measure? 6- In shear stress and strain, a body is subjected to two equal and opposite forces, acting...across the resisting section. 7- The malleability depends upon the 8- Can we consider (avoids the production delays) as advantage of good? 9- Why the machining operating performed? 10- Stress is defined as the internal resistance set up by the molecules of a material to resist.... , due to application of external forces.
stress and pore water pressure. 2- A soil profile consists of 10m of sand (Y=20 kN/m') over 3m of organic silt (Y=17KN/m, 0.5,0CR = 1,c, = 8 m2/year)over gravel. Initially, the water table is 2m below the ground surface and hydrostatic condition exists throughout the soil profile. Before constructing a structure on this site, the organic silt is preconsolidated by rapidly lowering the water table by 6m (to 8m below the ground surface) and simultaneously pumping from the gravel layer at such rate that the piezometric level in the gravel is lowered to the bottom of the organic silt. Compute settlement resulting from consolidation of the organic silt if the lowered ground water
Formulate the boundary-value problem for a beam (thin beam)
Fixed/built-in or encastré beams are usually used in structure due to their high stability and performance in resisting shear stress and bending moment. Your role in building and construction company is to analyse the shear force and bending moment in order to provide better design of such beams under variety of loads. Your manager asked you to provide a complete analysis as well as to deliver a report including your design recommendations. 100 KN/m 150 kN z (m) 5 7 10 Figure.2: Encastré beam under variety of loads Your tasks are as follows: 1- Construct free-body diagram (FBD) to show the reaction forces and moments, equivalent force of the distributed load., knowing that the upward reaction force on left side is 250 kN and the reaction moment is clockwise with a value of 1500 kN.m. 2- Show FBD for each required section/cutting, include the internal forces and moments. 3- Write the distribution functions of the shear force and bending moment for each cut in the beam. 4- By hand…
Fluid mechanics, i need solutions in 10 minutes please. MCQ/ what is the specific weight of the wooden beam? A-44.339 lb / ft³ B-40.842 lb / ft³ C-49.582 lb / ft³ D-55.825 lb / ft³ E-37.342 lb / ft³ F-53.144 lb / ft³ G-30.453 lb / ft³ H-51.330 lb / ft³ I-33.840 »/ ft³ J-47.835 lb / ft³ K-35.591 lb / ft³ L-28.247 lb / ft³ M-42.590 lb / ft³ N-58.631 lb / ft³