So-called "no-limits" free divers slide to deep water on a weighted sled that moves from a boat down a vinyl-coated steel cable to the bottom of a dive site. the diver reaches depths where a soda can would implode. after reaching the target depth, the diver releases the sled and an air bag opens and brings the diver quickly back to the surface. the divers have no external oxygen supply-just lungs full of air at the start of the dive. consider a person that made a 209.6-m free dive in the red sea. the dive took 3 minutes 28 seconds. he began the dive with his 9-l lungs full of air. by the time he passed the 200-m mark, his lungs had contracted to the size of a tennis ball. his body transferred blood from his limbs to essential organs such as the heart, lungs, and brain. this "blood shift" occurs when mammals submerge in water. blood plasma fills the chest cavity, especially the lungs. without this adaptation, the lungs would shrink and press against the chest walls, causing permanent damage. when he reached his target, he released the weighted segment of the specialized sled that had taken him down and opened an airbag, which began his return to the surface at an average speed of 3-4 m/s. assuming the person weighs 670 n (150 lb) and is 1.80 m tall, 0.30 m wide, and 0.15 m thick. find to the magnitude of the force that the deep water exerted on face side of his body. assume that normal pressure is 105n/m2 and density of water in the red sea is 1025kg/m3.