(english) An external force acting throughout the mass of a body. Gravity is a body force. An inertial force is a body force. ภาษาไทย ภาษาอังกฤษ Body force: 0 0 ภาพประกอบ (english) An external force acting throughout the mass of a body. Gravity is a body force. An inertial force is a body force.