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汉语拼音：dòng liàng

表示物质运动 状态的物理量。对于机械运动，动量的数值等于物体质量和速度的乘积，其方向就是速度的方向。质量 为零的光子也有动量，光子的动量要用量子力学知识计算。

• The spinning top was losing momentum.

  旋转的陀螺正在失去动量.

• A falling object gains momentum as it falls.

  下落的物体落下时动量增加.

• Radar, light, and other electromagnetic waves transfer momentum and energy through space.

  雷达 、 光和其它形式的电磁波将其动量和能量通过空间输送出去.

• In a crash, momentum changes abruptly but not instantaneously.

  在撞击过程中, 动量的变化是突然的,但非瞬时的.

• The law of momentum conservation could supplant Newton's third law.

  动量守恒定律可以取代牛顿第三定律.

• If the impulse is zero, there is no change in momentum.

  如果冲量为零, 则动量不变.

• This is the well - known principle of conservation of momentum.

  这就是众所周知的动量守恒定律.

• The gage deflection is due to the momentum transfer.

  压力计的偏转是由于动量交换的原因.

• We exploit the energy and momentum conservation laws in this way.

  我们就是这样利用能量和动量守恒定律的.

• He incorrectly used the product of velocity and weight to define momentum.

  他错误地将动量定义为速度与重量的乘积.

• Fig . 8 . 15 shows some experimental results for limiting adhesion against creep.

  图8.15表示试验得出的极限粘着力对爬动量的关系.

• Momentum may be thought of as a quantitative expression of inertia.

  动量可以被理解为惯性的定量表示.

• Momentum and energy have been united.

  动量和能量统一了起来.

• However, momentum is always conserved in a collision, whether or not the collision is elastic.

  然而, 不管碰撞是不是弹性的, 在碰撞过程中动量总是守恒的.

• The bland sameness of space is at the root of both momentum conservation and angular - momentum conservation.

  平淡无奇的空间一致性,既是动量守恒的根本,又是角动量守恒的根本.