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Projectile Motion is a common form of movement is very important. Mechanical materials usually involve throwing movement in the discussion of air resistance are ignored, but in the air movement of objects should be the role of air resistance. Air resistance on the impact of projectile movement can not be ignored. This paper analyzes the regularity of air resistance and to study the air resistance on projectile motion. When focused on resistance and speed is directly proportional to the time when the left side followed by movement of the movement, through the theoretical equations derived its trajectory, the projectile where the shooting range with a high and a relatively ideal situation, so that people on the left body movement, more in-depth understanding.

The projectile motion is one kind of common very important movement form. The mechanics teaching material usually when involves the projectile motion the discussion is neglects the air drag, but the movement object must receive the air drag in the air the function. The air drag to the projectile motion influence is not allow to neglect. This article has analyzed the air drag regularity, and studies the air drag to the projectile motion the influence. Mainly discussed that when the resistance and the speed first power is proportional the projectile motion follows the law of motion, obtains its locus equation through the theory inferential reasoning, will project the situation the altitude range and the firing distance and the ideal situation has carried on the comparison, causes the people to be more thorough to the projectile motion understanding.
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