momentum

英 [m?'ment?m] 美[mo'm?nt?m]
  • n. 勢(shì)頭；[物] 動(dòng)量；動(dòng)力；沖力

英英釋意

1. an impelling force or strength;
"the car's momentum carried it off the road"
2. the product of a body's mass and its velocity;
"the momentum of the particles was deduced from meteoritic velocities"