If I throw up a hammer, then the center of mass and only the center of mass will just go along a perfect parabola as if it were just a tennis ball.
我若是抛铁锤,那么质量重心,也是唯一的质量重心,会沿完美抛物线运动,就像一颗网球。
I throw up an object at a certain Angle - and I see a motion like this — boing! — and it comes back to the ground.
以一定角度抛出一个物体,我看到这样一条路径,嘣-,物体落回到了地面。
Suppose I take a tennis ball 100 and I throw up a tennis ball in 26.100.
比如,我拿了个网球,把它向上抛26。