Posted by **Physics** on Tuesday, September 22, 2009 at 7:53pm.

One car has twice the maqss of a second car, but only half as much kiinetic energy. When both cars increase their speed by 7.0 s^-1 m, they then have the smae kinetic energy. What were the original speeds of the two cars?

I got -16 or 2.4

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