Forces And Stresses
Bayani Gaba-gaba
Take a sheet of paper by one edge and hold it out flat. It flops. Now fold a lip of ten millimetres along the front edge and hold it out again, and it stands almost straight. You have added nothing. The paper is the same mass, the same material and the same thickness, and it is many times stiffer, because you changed the shape of its section rather than the amount of material in it.
That trick, and the arithmetic behind it, is the most useful thing in this lesson. You will learn the five forces the specification names, tension, compression, bending, torsion and shear, and how to spot which one is acting where in a product. You will calculate stress from force and cross sectional area, and strain from the change in length and the original length, which are the two formulae the specification's own maths column prints beside this section. And you will learn how materials can be reinforced, stiffened or made more flexible, using lamination, bending and folding, so that a design survives a load it would otherwise fail under. This is specialist technical principles content, examined in Section B of Paper 1.
Manufura
- Tension, compression, bending, torsion and shear.
- Stress and strain
- How materials can be reinforced, stiffened or made more flexible: eg lamination, bending, folding.
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Forces And Stresses. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- A force that twists a material about its own axis is called A. bending. B. compression. C. shear. D. torsion. Answer: D
- A rod of cross sectional area 50 square millimetres carries a tensile force of 2,000 newtons. What is the stress? A. 4 newtons per square millimetre B. 40 newtons per square millimetre C. 400 newtons per square millimetre D. 100,000 newtons per square millimetre Answer: B
- Which one of the following stiffens a sheet without adding any material? A. Bonding a second sheet to it B. Folding a lip along its edge C. Using a thicker gauge of sheet D. Riveting a plate across it Answer: B
- When a beam bends downwards, the material at the top surface is in A. compression. B. shear. C. tension. D. torsion. Answer: A
- A 500 millimetre cable stretches by 2 millimetres under load. What is the strain? A. 0.004 B. 0.04 C. 0.4 D. 250 Answer: A
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Forces And Stresses? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
