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18 July, 20:26

Momentum can be conserved in two-dimensional collisions, but kinetic energy is only conserved in some one dimensional collisions. a. True b. False because kinetic energy can be conserved in 2-d collisionsc. False because momentum is only conserved when all three dimensions are includedd. False because kinetic energy can only be conserved if all three dimensions are included

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  1. 18 July, 21:11
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    b. False because kinetic energy can be conserved in 2-d collisions

    Explanation:

    Momentum is always conserved in 2-d collisions. You have to consider each dimension.

    before ∑m*Vx = ∑m*Vx after

    before ∑m*Vy = ∑m*Vy after

    In elastic collision kinetic energy is also conserved in in 2-d collisions.

    before ∑ 1/2*m*V² = ∑ 1/2*m*V² after
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