Laptops can become projectiles in an emergency.

发生紧急情况时笔记本电脑会乱飞的抛射物。

And what about the quintessential act of God, the projectile hurled by Zeus himself?

上帝的典型作为，宙斯亲自投掷的抛射物又如何呢？

The tsunami of 2011 once again showed that harbor areas are extremely dangerous places to be during a tsunami, which transforms ships into giant projectiles.

2011年的海啸再次明，海啸发生时，海港地区是极其危险的地方，它会把船巨大的抛射物。

Oh,   and the velocity of a projectile at the very top of its path in the y-direction is zero!

哦，并且， y 方向路径最端的抛射物的速度为零！

Prosecutors now say they consider it " probable" that his death was caused by a police projectile after a post mortem showed marks on his chest.

检察官现，他们认为他的死亡很可能是由警方的抛射物造的，验尸结果显他的胸部有痕迹。

We also 3D printed a projectile that was a little more aerodynamic and we were amazed to see it travel 130 yards.

我们还用3D打印技术制作了一个更具空气动力学性能的抛射物，看到它能飞行130码，我们感到非常惊讶。

2 minutes and 45 seconds after DART's impact, LICIACube flew past Dimorphos to photograph the  impact site with its evolving plumes and ejecta.

美国国家航空航天局的双小行星重定向测试任务撞击后2分45秒，利西亚立方卫星飞越迪莫福斯， 拍摄了撞击地点及其不断扩散的羽状物和抛射物。

In other words, in the y-direction,   the acceleration of the projectile is constant and we can use the Uniformly Accelerated Motion  equations.

换句话说， y 方向上，抛射物的加速度是恒定的，我们可以使用匀加速运动方程。

In the y-direction the projectile is in free fall because the only force acting on the projectile  in the y-direction is the force of gravity.

y 方向上，抛射物处于自由落体状态，因为作用 y 方向上抛射物上的唯一力是重力。

So if that tennis ball is a projectile and we are studying projectile motion, the internal structure of the tennis ball is not relevant to the question we are trying to solve.

所以如果那个网球被视作一个抛射物， 而我们正研究抛射运动，那么网球的内部结构对于我们试图解决的问题是不相关的。