Just as linear momentum is the product of mass and velocity , so the angular momentum of a body is defined as the product of its moment of inertia and its angular velocity 正如线性动量是质量和速度乘积一样,物体角动量也定义为其惯性矩和角速度的乘积。
In order to form a stroke pattern mentioned above , i ' m assuming you ' ve moved into the ball with four steps ( steps 1 , 2 ) to place the contact between the width of the feet ( step 3 ) and transfer power with linear momentum ( step 4 ) while keeping centered and balanced ( step 5 ) 为了形成上面提到的击球模式,我假定你是使用4步法移动接近球(第1 , 2课内容) ,击球点在两脚宽度之内(第3课) ,使用的是线动量(第4课) ,同时保持身体的重心和平衡(第5课)