In swimming, physics is applied throughout the sport. For example the angle at which you place your hand into the water is physics. The way you flip turn and the placement of your feet is also another way that physics is applied to swimming. The placement of your arms is key in swimming and you have to place your angle correctly into the water to get the most benefit out of that stroke. If you place your arm to shallow you won't get enough pull in that stroke and you'll speed. If you swing your arm at a higher angle you will again lose speed and probably hurt your shoulders as well. Another important factor in swimming is your flip turn and where you place your feet on the wall. If you're slow to flip over and place your feet your acceleration off the wall will not be as fast as when you place your feet correctly. Throughout the sport swimming physics is applied throughout with the angle of your arms, the placement of your feet, and also with having your arms placed in streamline. If you don't apply physics to swimming your speed will become slower as well as your acceleration.