Welcome to your Deformation of Solids - Hookes Law and Youngs Modulus(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. A spring extends by 4 cm when 10 N is suspended from it. Two of these springs are used as shown to carry a 30N load. What is the extension of each spring? 8cm 6cm 12cm 4cm2. The negative ratio between the lateral strain and the direct tensile strain is known as ______ Elastic modulus Engineering strain Poisson’s ratio True strain3. Which object behaves as an elastic solid as it deforms? A piece of metal cut by a saw A car damaged in a collision A football as it is kicked A bullet as it hits a solid metal wall4. A stress that changes one dimension only is called Linear strain Linear stress compressive stress Volumetric stress5. The area defined by the dotted line labeled A refers to Modulus of elasticity Modulus of ductility6. Which part of the graph shows the limit of proportionality for an elastic solid? OP O PQ P7. A spring extends by 6.0cm when a 15N weight is suspended from its lower end. Three of these springs are used as shown to support a 90N weight. What is the extension of each spring? 12cm 2.0cm 36cm 110cm8. A spring balance is calibrated to give readings in newtons. The graph shows how the length of the spring varies with the load. A load causes the spring of the balance to extend by 3cm. What is the balance reading? 10N 15N 3N 5N9. What is the reason for elastic deformation? Slip Twinning Displacement of atoms to a fraction interatomic distance Dislocations intersection10. The yellow line indicates which of the following? Modulus of elasticity Strength of ductility Pre-fracture stress load11. Force applied on a unit area of a crystal is called strain Stress Flexibility elasticity12. Which of the following is calculated by dividing the change in length of the material by the original length of the material Stress Strain13. The diagram shows how the length of a spring changes when a load of 10N is hung on it. The 10N load is replaced by a 20N load. What is the new length of the spring? 14cm 16cm 11cm 6 cm14. A metal wire, of initial length 1000mm, extends by 4mm when a load of 2N is added to it. What is the length of the wire when a further 3 N is added, assuming that the wire does not extend beyond the limit of proportionality? 1010mm 1012mm 1006mm 1008mm15. What is atomic density on prismatic plane? 1/a² 2/ac 2/a² 2/√3a²16. By altering composition or heat treatment, elastic modulus can be increased to very high orders. True False17. Which property of a body cannot be changed if a force is applied to it? Its size Its velocity Its mass Its shape18. Elastic modulus can’t be changed by ______ cold working heat treatment alloying by increasing section thickness19. Array of points representing atoms, ions or molecules of a crystal arranged at different sites in a three-dimensional space is called solid Crystal lattice substance compound20. A spring has a length of 9 cm when loaded with a 200 g mass. The extension-mass graph for the spring is shown. The 200g mass is replaced with a 100g mass. What is the new length of the spring? 9 cm 10cm 8cm 7 cm21. Material D demonstrates which of the following properties Ductile Strong but not ductile Brittle Plastic22. _____ is an anisotropic property of a crystal. Elastic modulus Poisson's ratio Density Damping23. A crystalline solid has only vibrational energy an ordered structure low KE Rotational energy24. The table shows how the extension of a spring varies with load. Between which two loads would you find the limit of proportionality? 10N and 12N 0N and 2N 14N and 16N 8N and 10N25. Molecules of a solid possess Polymeric structure Translational motion Ideal arrangement Rotatory motion26 out of 25Time is Up!