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A rigid body is an object that does not deform under the influence of external forces. It maintains its shape and size, and all its points move in the same direction and distance at any given time.
Force is a push or pull that can cause an object to accelerate or change its state of motion. It is a vector quantity and is measured in Newtons (N).
Torque is a measure of how much a force acting on an object causes that object to rotate. It is a vector quantity and is measured in Newton-meters (Nm).
Force and torque are both external forces that act on a rigid body. Force causes linear motion, while torque causes rotational motion. The distribution of force and torque on a rigid body determines its overall motion and stability.
A static rigid body is in a state of rest or constant motion, whereas a dynamic rigid body is accelerating or decelerating. In other words, a static rigid body has a net force and torque of zero, while a dynamic rigid body has a non-zero net force and torque.