Mechanics 4

Mechanics 4 - Mechanics 4 Elastic deformation another form...

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Mechanics 4

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A classic example of elastic deformation is given by springs: When the force is removed, they return to their original shape, length. Elastic deformation: another form of potential energy
Hooke’s Law The spring must exert an upward force on you to balance gravity. When you step on a spring, it contracts. When it contracts (or expands), it acts to oppose this deformation according to the equation where x is the amount by which the spring is squeezed or stretched from its equilibrium length .

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Energy Stored in a Spring In order to compress or stretch a spring, you must apply a force to overcome the force exerted by the spring. Hence, you must do work. Therefore, there is energy stored in a compressed or stretched spring.
L + x , you exert a force kx . On average, you exert a force Hence, the work This energy is stored in the spring : Suppose you compress the spring so that it goes from a length L to a length L + x . When its length is

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This note was uploaded on 10/14/2008 for the course PHYS 10 taught by Professor Gruner during the Fall '08 term at UCLA.

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Mechanics 4 - Mechanics 4 Elastic deformation another form...

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