| 单词 | projectile |
| 释义 | projectile Any body that is thrown or projected. If the projectile is discharged on the surface of the earth at an angle θ to the horizontal it will describe a parabolic flight path (if θ < 90° and the initial velocity < the escape velocity). Neglecting air resistance, the maximum height of this flight path will be (v2sin2θ)/2g , where v is the velocity of discharge and g is the acceleration of free fall. The horizontal distance covered will be (v2sin2θ)/g and the time of the flight will be (2vsinθ)/g |
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