200分求）大一物理题,因为是英语版的,呵呵The particles each of mass m and speed v,travel in opposite directions along parallel lines separated by a angular,The total angular momentum of the system about any origin is_______.翻译一
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200分求）大一物理题,因为是英语版的,呵呵The particles each of mass m and speed v,travel in opposite directions along parallel lines separated by a angular,The total angular momentum of the system about any origin is_______.翻译一
200分求）大一物理题,因为是英语版的,呵呵
The particles each of mass m and speed v,travel in opposite directions along parallel lines separated by a angular,The total angular momentum of the system about any origin is_______.
翻译一下也可以,
200分求）大一物理题,因为是英语版的,呵呵The particles each of mass m and speed v,travel in opposite directions along parallel lines separated by a angular,The total angular momentum of the system about any origin is_______.翻译一
fill in the blank: mvd.
两个质量为m速度为v的粒子沿着被某角度分开的平行线做相反方向的运动.角动量总值在任何原始出发点（都相等）
let the point be (x,y)
angular momentum of first particle = mvr1sin@ = mvp
angular momentum of second particle = mvr2sin@ = mvq
net angular momentum ( the angular momenta are in the same direction) = mvp+mvq =mvd (constant and independent of x and y)