When the very top of the domino hit something stationary, the momentum of the domino is the mass times the velocity of the top of the domino, or the momentum is the mass times the velocity of the centre of the mass?
2007-01-28 17:09:44 · 1 answers · asked by 3.141592653589793238462643383279 3 in Science & Mathematics ➔ Physics
For an extended body like a domino there is more to momentum than there is for a point mass. The speed of a domino is not just a single vector, it is two vectors: one for translation and one for rotation. The total momentum is the sum of the linear momentum (mass x velocity) and the angular momentum (moment of inertia x angular velocity).
When the top of the domino strikes something, the force changes the linear momentum but it also produces a torque about the center of gravity of the domino changing the angular momentum as well.
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2007-01-28 17:24:19 · answer #1 · answered by Pretzels 5 · 1⤊ 0⤋