Forces
Force is defined as the push or pull which can set a stationary object in motion or cause a moving body to stop. In other words it accelerates or decelerates the body. The acceleration or the deceleration is directly proportional to the resultant of all the force vectors acting on the body. In extended bodies, the force can result in deformation (stresses) or cause rotation (torque).
Aristotle’s school of thinking believed that it was the natural state of an object to remain stationary and required force to disturb them from this state. Newton openly stated that force produces a change in the momentum rate which is constant if the force is also constant.
Types of forces include : short range weak forces that exist in atoms, electromagnetic forces that exist between charges, gravitational force.
Superposition Principle - For two or more forces acting on an object, the resultant effect can be calculated by the summing all the forces vector ally.
Parallelogram law of vectors - On adding two vectors that are represented by the sides of the parallelogram, the resultant vector is equivalent to the parallelogram’s transversal in magnitude as well as direction.
