Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
3rd Edition
ISBN: 9780133593211
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Chapter 3, Problem 15MDP
To determine
Prove the Hooke’s law for a metal rod.
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Homework : Materials for Oars
• 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.
It 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?
Answers must be at least in 4 decimal places.
Chapter 3 Solutions
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
Ch. 3.4 - We often express criteria in terms that are not...Ch. 3 - 1. Prove the law of the lever.Ch. 3 - Demonstrate conservation of energy (potential...Ch. 3 - Determine the coefficient of static and sliding...Ch. 3 - 4. Prove that the angle of incidence is equal to...Ch. 3 - Prob. 5MDPCh. 3 - Prob. 6MDPCh. 3 - Prob. 8MDPCh. 3 - Find the center of gravity of an irregular piece...Ch. 3 - 10. Show that for circular motion, force = mass ...
Ch. 3 - Prob. 11MDPCh. 3 - Measure the effective porosity of a sand sample.Ch. 3 - Prob. 13MDPCh. 3 - 14. Prove Hookes law for a spring.Ch. 3 - Prob. 15MDPCh. 3 - Prob. 16MDPCh. 3 - Prob. 18MDPCh. 3 - Prob. 19MDPCh. 3 - 21. Relate the magnetic strength to the radius.Ch. 3 - Determine the density and specific gravity of a...Ch. 3 - Determine the thickness of a specified coin or a...Ch. 3 - Prob. 26MDPCh. 3 - What is the volumetric flow rate from your shower?
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- /arrow_forwardThe rods CE (A = 130 mm²) and DF (A = 250 mm²) are attached to the rigid bar ABCD as shown. Knowing that the rods are made of aluminum, E = 70 GPa. A P 45 cm B 30 cm 20 cm CO 60 cm D 75 cmarrow_forward1- 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.arrow_forward
- True or False: ( ) Buckling is the critical failure mode when Euler beams are subjected to very larger compressive stress than the yield strength.( ) Fatigue failure of the structure occurs due to the sudden impact load.( ) The reliability of products always decreases with respect to time or cycles with constant failure rate.arrow_forwardPart 4 Use your bending-moment diagram to determine the maximum bending moment, Mmax, and its location, Xmax. Use the bending- moment sign convention detailed in Section 7.2. Answers: Xmax = Mmax = i i m kN-marrow_forwardPlease answer in 30 minutes. STRENGTH OF MATERIALS (Please write the complete solutions and FBDs completetely and correctly. No long explanation needed.Thumbs up will be given) A loaded beam, 60 mm wide by 200 mm high and 8 in long, has the shear and moment diagrams as shown below. (a) Determine the magnitude, type and location of the maximum flexural stress (b) Determine the type and magnitude of stress in a fiber 40 mm from the top of the beam at a section 2.5 m from the left end, Express final answers in MPa. (Use I=bh3/12)arrow_forward
- Except for the stated examples below, cite three (3) specific examples each where the following loads discussed are applied in the real world. Explain and include necessary illustrations. the subject is Mechanics of Deformable Bodiesarrow_forwardFor the beam below, the support reactions at QA and B have deen calculated and given as below. Please generate its shear force diagram and calculate the max positive shear force along the beam: ____ KN. Calculate your answer to 1 decimal place.arrow_forward1. Moment of inertia for a solid sphere of a given volume is hollow spherical shell of the same volume (greater/smaller) that of aarrow_forward
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