For instance, if many forces are applied on an object then the net force is equal to the summation of all the forces. Net Force is the total force applied on any object. law of motion: a statement in dynamics: a body at rest remains at rest and a body in motion remains in uniform motion in a straight line unless acted upon by an external force - called alsoRN Newtons first law of motion. So, the internal forces cannot change the overall motion of the object whereas external force can do. Your shoulder is a new force that is introduced in order to keep your gun from flying away from you. For example, the gravitational force which is applied by the Moon on Earth is external force whereas the force of gravity that the inner core of Earth exerts on its boundaries is the internal force. A body at rest remains at rest or, if in motion, remains in motion at constant velocity unless acted on by a net external force. It is a vector quantity which means it has both magnitude as well as direction and its unit is Newton (N).į o r c e = M a s s o f t h e o b j e c t A c c e l e r a t i o n F o r c e = A c c e l e r a t i o n M a s s o f t h e o b j e c t Įxternal Force is the force which is caused by the object is not present in the system unlike internal force. Force is the push or pull applied on any object with mass which results in the change in velocity (acceleration) of the object.