Movement of a firm body with a liquid of small viscosity

On the basis of the approach F. L. Tchernousko the equations in the integro-differential form of spatial movement of a body with a cavity wholly filled liquid of small viscosity are received. For a special case of movement the integro-differential equation is shown to ordinary differential, and with the help of a method of averaging the approached analytical decision is received. The examples showing accuracy of the received decision and influence of parameters of system on its movement are given.