My friends, many thanks for your answers. With physics I could not 
Plz, watch it. After 8 minutes, I describe the behavior of worker Development GW: GENERALS 2 - Краткий обзор и наши задачи - YouTube. It is for you to understand what I’m saying. And after 11 min here my vehicle Development GW: GENERALS 2 - Краткий обзор и наши задачи - YouTube. How do I implement a realistic behavior for it? I understand from my reading the best option is a system of complex animation or not?