Final answer:
The correct racing posture of a swimmer, cyclist, or downhill skier minimizes the effect of drag, a force that opposes motion caused by air or water resistance.
Step-by-step explanation:
The correct racing posture of a swimmer, cyclist, or downhill skier minimizes the effect of drag. Drag is the force that opposes motion and is caused by air or water resistance. By maintaining a streamlined posture, athletes can reduce drag and move more efficiently through the water, air, or on the slopes.
For example, swimmers often tuck their heads down, align their bodies horizontally, and extend their arms and legs to reduce resistance. Cyclists and downhill skiers also adopt an aerodynamic position by crouching low and minimizing their surface area facing the direction of motion.
By minimizing drag, athletes can increase their speed and performance, potentially making the difference between winning and losing a race.