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since kinetic energy is proportional to the square of velocity it is multiplied by 2 x 2 which is 4

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Q: If the velocity of an object is doubled its kinetic energy is multiplied by?

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momentum is doubled, kinetic energy is quadrupled

If the speed of an object doubles, its kinetic energy quadruples. This is because velocity is squared in the formula for kinetic energy.

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If speed/velocity is doubled and mass remains constant, then kinetic energy becomes quadrupled.

It doubles.

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momentum is doubled, kinetic energy is quadrupled

If the speed of an object doubles, its kinetic energy quadruples. This is because velocity is squared in the formula for kinetic energy.

If speed/velocity is doubled and mass remains constant, then kinetic energy becomes quadrupled.

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It doubles.

Kinetic energy is proportional to velocity2, so if velocity is multiplied by four the kinetic energy is multiplied by sixteen

The relation between kinetic energy is proportional to the square of velocity. Momentum is directly proportional to velocity. If the momentum of an object is doubled, but its mass does not increase (so velocity remains well below the speed of light), then its velocity is doubled. If the velocity is doubled then the kinetic energy increases by the square of 2, or four time.

The kinetic energy would be quadrupled, and the momentum would be doubled.

If the velocity of Earth were to double, it would have 4 times the kinetic energy. Twice the current kinetic energy would already be enough to catapult the Earth away from the Sun - never to return.

Twice the mass --> twice the kinetic energy.

If the velocity is doubled, then the kinetic energy increases by 4 times

Kinetic energy = 1/2 (mass) (velocity)2That little 2 after the velocity says that the kinetic energy is proportional to thesquare of the velocity.If the speed (magnitude of velocity) is increased by a factor of 9, then the KEis increased by a factor of (9)2 = 81 .