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# Get Physics: a general course. Volume I : Mechanics Molecular PDF By Savelyev I.V.

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Extra resources for Physics: a general course. Volume I : Mechanics Molecular Physics

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In the state of equilibrium, the external forces F 1 and F s will be balanced by the elastic forces set up in the spring as a result ~ of its deformation. ll is Fig. 9. Elastic Forces Any real body becomes deformed, Le. changes its dimensions and shape. under the action of forces applied to it. If the body regains its initial dimensions and shape after the action of the forces stops, •• the deformation or strain is called elastic. lvu.. 24) arEl;lCCurate OMS. For elastic and friction forces we can obtain only approximate empirical formulas that are considered in the following sections.

Elastic Forces Any real body becomes deformed, Le. changes its dimensions and shape. under the action of forces applied to it. If the body regains its initial dimensions and shape after the action of the forces stops, •• the deformation or strain is called elastic. lvu.. 24) arEl;lCCurate OMS. For elastic and friction forces we can obtain only approximate empirical formulas that are considered in the following sections. 25) The constant of proportionality k is called the spring constant. The statement that the elastic force and deformation are proportional to each other is called Hooke's law.

If at every point of a field the force acting on a particle is identical in magnitude and direction (F = const), the field is called homogeneous. A field that changes with time is called non-stationary. A field that remains constant with time is called stationary. , For a stationary field, the work done on a particle by the force\$. of the field may depend only on the initial and final positions of th~ particle and not depend on the path along which the particle moved. Forces having such a property are called conservative.