物理学 第五版 4-2力矩转动定律转动惯量 转动定律( The law of rotation) M=JaM=a 刚体定轴转动的角加速度与它所受的合外 力矩成正比,与刚体的转动惯量成反比 When the rigid body rotates about a fixed axis, the angular acceleration of the rigid body is proportional to the combined external torgue that the rigid is subject to, it is inversely proportional to the moment of inertia of the rigid body 第四章刚体的转动 9/364-2 力矩 转动定律 转动惯量 第四章 刚体的转动 物理学 第五版 9/36 刚体定轴转动的角加速度与它所受的合外 力矩成正比 ，与刚体的转动惯量成反比 . 转动定律(The law of rotation) M  J    M  J When the rigid body rotates about a fixed axis, the angular acceleration of the rigid body is proportional to the combined external torque that the rigid is subject to, & it is inversely proportional to the moment of inertia of the rigid body