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1理解向心力概念1)定义做圆周运动的物体所受到的沿着半径指向圆心的合力叫做向心力.2)向心力的特点方向时刻在变化,总是与线速度的方向垂直.在
1 Understanding the concept of centripetal force 1) The defined force along the radius of the center of a circularly moving object is called the centripetal force. 2) The direction of the centripetal force is always changing, always perpendicular to the direction of the linear velocity.