When the speed of a moving physical object is doubled, what happens to___________________?
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Answer: D. its momentum is doubled
Explanation
Linear momentum equals mass multiplied by velocity, giving a directly proportional relationship. Doubling the movement speed while keeping mass constant doubles the total momentum. Momentum is a vector quantity directed along the line of motion. Momentum conservation is a cornerstone principle in classical collision mechanics. Units of momentum are expressed in kilogram meters per second. Applying an external impulse changes the linear momentum of a physical body.
Automobile safety crash tests analyze momentum transfer during vehicle collisions. Sports physics uses momentum conservation to explain impacts in baseball and billiards. Rocket propulsion relies on expelling mass to alter momentum in outer space. Kinetic energy quadruples when speed is doubled, making the energy option incorrect here. Acceleration is not automatically doubled simply because an object's speed doubles. Potential energy depends on height or position rather than directly on speed.
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