Solving a problem in physics, section 29, paragraph 31

Solving a problem in physics, section 29, paragraph 31

31. The body of mass m = 10 g performs damped oscillations with a maximum amplitude of 7cm, the initial phase of zero attenuation coefficient of 1.6 to 1. On this body began to operate external periodic force, under the action of which the steady-state oscillation. The equation of forced oscillations is of the form x = 5sin (10πt-0,75π) cm. Find: 1) the equation of free oscillations; 2) Equation of external periodic force.

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)