When an object falls and hits the floor (without bouncing off the floor), the normal force of the floor on the object before, during, and after the collision, A) cannot be determined B) is zero, then increases to a value less than the weight mg of the object, then is equal to mg. C) is equal to the weight of the object D) is zero, then increases to a value greater than the weight mg of the object, then decreases, and eventually is equal in magnitude to mg. E) is zero, then increases to a value greater than the weight of the object, then decreases to zero Can you explain why?