Final answer:
Momentum is conserved, while kinetic energy can change due to energy transformations.
Explanation:
Momentum is the product of an object's mass and velocity, taking into account speed and direction. It is neither created nor destroyed in a closed system, demonstrating conservation of momentum.
Kinetic energy, on the other hand, is the energy an object possesses due to its motion, calculated as one half of the mass times the square of its velocity. Unlike momentum, kinetic energy can be transformed into other forms of energy.
Therefore, while momentum is conserved in interactions within isolated systems, kinetic energy may not remain constant due to energy transformations.
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