Posted by **Ashley** on Tuesday, November 22, 2011 at 10:01am.

The kinetic energy of a moving body is directly proportional to its mass and the square of its speed. If the mass of a bullet is halved, by what factor must its speed be increased to have the same kinetic energy as before?

- Algebra II -
**Henry**, Wednesday, November 23, 2011 at 8:16pm
sqrt2.

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