给它一个初速度。
以初速度为0释放。
外脚背踢球可以施加很大的力，球的初速可能超过30m/s（70mph）。
Kicking it with the outside of his foot allowed him to hit the ball hard, at probably over 30 ms–1 (70 mph).
跳远成绩主要取决于起跳离地瞬间人体重心腾起的初速度和腾起角度。
Long jumping performance depends mostly on the initial speed and Angle of projection of body gravity.
当今世界跳远技术的主要特征和发展趋势是：在尽可能快的助跑中获得较大的腾起初速度和适宜的腾起角度。
At present, the main characteristics and trend of long jump technique in the world is to obtain bigger initial swinging speed and proper swinging Angle in approach as fast as possible.
位移，初速度，末速度，加速度和时间。
Displacement, Initial velocity, Final velocity, Acceleration and Time.
初速随活塞质量的变化是先增大而后减少。
The variation of muzzle velocity with piston weight is increased first, and then decreased.
在这个实验中，两个光门测量小球的初速度。
For this activity, two photogates measure the initial speed of the ball.
高炮要准确射击必须准确确定和修正初速偏差量。
Precision fire of AA gun must accurately confirm and correct muzzle velocity deviation and adjustment.
即使以最初速度运行，京沪间5小时内即可到达。
Even at the initial speeds, the trains will take less than five hours to travel between Beijing and Shanghai.
给出以不同初速度和高度发球时球拍角度的参考值。
Reference values of the serving angles of the racket with different speed and height were provided.
分析了可燃药筒对初速或然误差的影响因素及限制办法。
This paper analyses the effective factors and restricted methods of combustible cartridge case charge on muzzle velocity probable error.
合理增加装药量、大幅度提高膛压是提高初速的基本方法。
Reasonably increasing charge mass and considerably increasing pressure are basic methods to improve muzzle velocity.
卫星要在其轨道上运行所需要的只是由运载火箭给它的初速度。
All the satellite needs in order to move in its orbit is the initial speed given it by carrier rocket.
利用实际的弹头重量以及射击的三发平均枪口初速来计算威力系数。
Power factor is calculated using the actual bullet weight and the average velocity of the three rounds fired.
对具有初速的刚性块与有限长弹性杆轴向冲击的稳定问题进行了分析。
The axial stability of impacting an elastic rod with constrained length by a rigid piece with initial velocity is analysed.
炮弹引信炮口保险距离设计指标不但与弹丸威力有关，还涉及弹丸初速。
And the design requirements of the muzzle safe distance of the projectile fuze are concerned with not only the power of the projectile, but also its muzzle velocity.
在满足最大膛压的约束下，提高弹丸初速始终是内弹道研究设计者的目标。
Improving the muzzle velocity of projectile based on the restriction of the maximum bore pressure is the interior ballistic devisers goal all the time.
杀伤弹药的杀伤面积通常根据破碎性试验、球形靶试验和破片初速试验确定。
The lethal area of the fragmentation ammunitions is generally determined in accordance with the fragmentation test, spherical target test and the test of velocity measurement.
分析引起射弹散布的原因，选取初速和射角作为建立随机概率模型的初始参数。
The reason of the projectile dispersion is analyzed and the initial velocity and elevation Angle are taken as the initial parameter to formulate the random mathematic model.
时间引信的精度取决于多种因素，但弹丸初速是决定弹丸飞行特性的主要参数。
The precision of time fuze rests with many factors, but the muzzle velocity of a projectile is a key parameter which decides on flight characteristic of a projectile.
关于这个物体，我们需要了解什么，我要强调的，就是这个物体的初位置和初速度。
What is it you have to know about this object that was thrown, I claim, is the initial location of the object and the initial velocity.
本文对弹速特别是弹头初速测量的现状及存在问题进行了分析，并提出了一些建议。
The paper deals with especially the measuring of initial velocity of bullet and its limitations. Some proposals are made.
问题被当作结构在规定初速度或脉冲载荷作用下的非线性(大变形与弹塑性)动反应。
The problem is considered as dynamic response of the structure subjected to specified initial velocity or impulse load, with large deformation and plasticity.
结果表明，装药量在其正常范围内波动时，装药量的变化对初速或然误差的影响并不显著。
Results show that the effect of charge weight variation on the muzzle velocity probable error is not significant when the variation is within normal range.
在本文中详细介绍了初速雷达数据采集系统的结构和功能，以及实现的方法和采用的技术。
The paper deals with in detail the specific structure and function of the radar data acquisition system, and introduces its method of realization and applied technology.
该文研究了某平衡抛射武器发射药厚度对其初速或然误差、最大膛压等内弹道性能的影响。
The paper studies the influence of propellant thickness on the interior ballistic performance of an equilibrium launcher, such as, probable error of muzzle velocity, maximum pressure.
对获得的典型弹片迎风面积和弹片测速数据综合计算，就可获得弹丸初速及弹片衰减系数。
After synthetically calculating the fragment windward area and the measurement data of the speed, we can obtain the initial velocity of the shot and the decay coefficient of the fragment.
研究了触点分离初速度(动触点与静触点刚刚分离时刻的动触点速度)对电弧能量的影响。
This paper emphasizes on the influences of arc energy by the contact breakaway initial velocity that is the velocity of moving contact at the time of moving contact and stationary contact breaking.
研究了触点分离初速度(动触点与静触点刚刚分离时刻的动触点速度)对电弧能量的影响。
This paper emphasizes on the influences of arc energy by the contact breakaway initial velocity that is the velocity of moving contact at the time of moving contact and stationary contact breaking.
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