... dimensions or shape) are removed. An elastic material obeys Hooke's law, which states that its deformation is proportional to the applied stress up to a certain point, called the elastic limit, beyond which additional stress will deform it permanently. Elastic materials include metals and rubber. However, all materials have some degree of elasticity. This was taken from the text book issued to me from my school: " The extension is directly proportional to the load. This is called Hooke's Law. This law also applies to the stretching of metal wires and bars. From your results, plot a graph of extension against load. A straight line through the origin of the graph confirms that the extension is directly proportional to the stretching force. What happens with very heavy loads? Hooke's Law only applies to the straight part of the graph (up to the limit of proportionality)." The point P is called the elastic limit. If a spring is taken ...

See this essay or coursework document in full right now