1. When a force is resolved into two parts along two mutually perpendicular directions, the parts along those directions are called resolved parts. When a force is split into two parts along two directions not at right angles to each other, those parts are called component of a force. And process is called composition of a force.
2. All resolved parts are components, but all components are not resolved parts.
3. The resolved parts of a force in a given direction do not represent the whole effect of the force in that direction.