Consider a diver who is raised from 30 m below the water level by means of a rope. mainly two forces oppose the pulling of the diver. one of them is the weight of the diver and the other is the frictional force which is proportional to the square of the speed at which the diver is pulled. write a differential equation by considering force balance using newton's second law of motion the internal blood pressure of the diver varies at a rate which is proportional to the difference between the external water pressure and the internal blood pressure of the diver. the variation of the internal blood pressure should not be too high, else the diver will die out of decompression sickness. write a differential equation that models the variation of the blood pressure of the diver