Kniga posvyashchena tverdym telam, k kotorym prilozhena ploskaya proizvol'naya sistema sil. Prikhoditsya reshat' zadachi po opredeleniyu reaktsiy opor takikh tel. V literature predstavleny obychno zastyvshie tverdye tela s postoyannymi lineynymi parametrami. Takie tverdye tela ne pozvolyayut organizovat' uchebno-issledovatel'skuyu rabotu obuchayushchikhsya. Sovershenstvuya uchebnyy protsess, avtor razrabotal tverdye tela s izmenyaemymi lineynymi parametrami, kotorye pozvolyayut ispol'zovat' ikh dlya issledovatel'skikh tseley i znachitel'no uluchshit' inzhenernuyu podgotovku studentov. Kniga prednaznachena dlya studentov, aspirantov, prepodavateley i inzhenerno-tekhnicheskikh rabotnikov.