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momentum
amount of exercise
運動量は質量と速度の積で表される。
Momentum is expressed as the product of mass and velocity.
衝突では二物体間の運動量の和が保存される。
In a collision, the sum of momentum between two objects is conserved.
ロケットは運動量保存の法則に従って推進力を得る。
Rockets obtain thrust according to the law of conservation of momentum.