Work occurs when an applied force results in movement of an object in the same direction as the applied force. an object is subjected to balanced forces resulting in movement of the object. the energy present is the result of the force acting on the object. the movement of the object was caused by a force and is in the opposite direction of the force.

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?