3. Rotation of a rigid body around a fixed axis 刚体的定轴转动 Example: A rotation around a fixed axis Every point of the rigid body moves in a circle(刚体上各点都 作圆周运动 轴3. Rotation of a rigid body around a fixed axis 刚体的定轴转动 Example: A rotation around a fixed axis 轴 Every point of the rigid body moves in a circle(刚体上各点都 作圆周运 动)