A vehicle's kinetic energy is directly proportional to which property?

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Multiple Choice

A vehicle's kinetic energy is directly proportional to which property?

Explanation:
Kinetic energy grows with how fast the vehicle is moving. In physics, it’s calculated as KE = 1/2 m v^2, so for a given mass, increasing speed increases kinetic energy, and it does so quite strongly because velocity is squared. That’s why a faster car has more motion energy than a slower one with the same mass. Engine size or color don’t directly change this energy—the engine size won’t alter KE unless it changes speed or mass, and color has no physical effect on motion energy. So speed is the property that most directly determines kinetic energy.

Kinetic energy grows with how fast the vehicle is moving. In physics, it’s calculated as KE = 1/2 m v^2, so for a given mass, increasing speed increases kinetic energy, and it does so quite strongly because velocity is squared. That’s why a faster car has more motion energy than a slower one with the same mass. Engine size or color don’t directly change this energy—the engine size won’t alter KE unless it changes speed or mass, and color has no physical effect on motion energy. So speed is the property that most directly determines kinetic energy.

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