China Naming Network - Eight-character Q&A - When there is no wind, the parachutist parachutes from a plane flying horizontally, and is subjected to air resistance during the falling process, as shown in Figure 4, which depicts the falling speed.
When there is no wind, the parachutist parachutes from a plane flying horizontally, and is subjected to air resistance during the falling process, as shown in Figure 4, which depicts the falling speed.
B
Skydivers are subjected to gravity in the air, with constant magnitude and vertical downward direction, and are also subjected to air resistance, which is always opposite to speed and increases with the increase of speed, and vice versa. In the horizontal direction, the resultant force on the athletes is the component of air resistance in the horizontal direction, so we can know that the athletes are doing deceleration movement with gradually decreasing acceleration in the horizontal direction. In the vertical direction, under the same action of gravity and air resistance, athletes first accelerate with decreasing acceleration, and then.