Hemiplegia or diplegia: One arm and one leg on the same side of the body (hemiplegia) or both legs (diplegia or paraplegia) are affected. These are the most common types of spastic cerebral palsy. Monoplegia: Only one arm or leg is affected. Quadriplegia : Both arms and both legs are affected. Usually the trunk and muscles that control the mouth, tongue, and windpipe are affected too. This makes eating and talking difficult.
The Meaning of Force. A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction.
Here, F describes the force acting, m is the mass of the object, and a is its acceleration, the change in its motion. 1  Like motion, force has both a value or strength, and a direction in which it acts. 2  In the metric system, the unit of force is called a Newton, whose abbreviation is N.