![]() ![]() The gradient of a force-extension graph before the limit of proportionality is equal to the spring constant. The limit of proportionality is also described as the 'elastic limit'. Physics (Single Science) Physics is the study of energy, forces, mechanics, waves, and the structure of atoms and the physical universe. Non-linear extension and inelastic deformation can be seen above the limit of proportionality. Linear extension and elastic deformation can be seen below the limit of proportionality. Materials like clay or putty usually show non-linear extension. Non-linear extension occurs more in some materials than others. In this instance, the relationship between force and extension changes from being linear, or directly proportional, to being non-linear. Once a material has gone past its elastic limit, its deformation is said to be inelastic. When an elastic object is stretched beyond its elastic limit, the object does not return to its original length or shape when the force is removed. The elastic limit of a material is the furthest point it can be stretched or deformed while being able to return to its previous shape. This works until the limit of proportionality is exceeded. For example, if the force is doubled, the extension doubles. ![]() For a given spring and other elastic objects, the extension is directly proportional to the force applied. Past Papers & Mark Schemes for the AQA GCSE (9-1) Maths course. The spring constant is different for different elastic objects. This section includes recent GCSE Physics past papers from AQA, Edexcel, OCR, WJEC. The higher the spring constant, the stiffer the spring. The limit of proportionality refers to the point beyond which Hooke's law is no longer true when stretching a material ![]() Spring constant is a measure of the stiffness of a spring up to its limit of proportionality. Then calculate using the values in the question: Calculate the spring constant.įirst rearrange \(F = k \: e\) to find k : The spring stretches reversibly by 0.15 m - the fact that the string stretches reversibly means that it will go back to its normal shape after the force has been removed. extension ( e ), or increase in length, is measured in metres (m)Ī force of 3 N is applied to a spring.spring constant ( k ) is measured in newtons per metre (N/m).Hundreds of videos arranged by topic, so you have everything. Physics Equations Sheet - GCSE Physics (8463) FOR USE IN JUNE 2022 ONLY Turn over Physics Equations Sheet GCSE Physics (8463) FOR USE IN JUNE 2022 ONLY HT Higher Tier only equations kinetic energy 0.5 × mass × (speed)2 k L 1 2 2 elastic potential energy 0. The extension of an elastic object, such as a spring, is described by Hooke's law: AQA GCSE Physics 9-1 The ultimate site for anyone taking Combined Trilogy or Physics GCSEs. Extension happens when an object increases in length, and compression happens when it decreases in length. ![]()
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