Problem: One car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 7.5 m/s , they then have the same kinetic energy.What were the original speeds of the two cars?

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One car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 7.5 m/s , they then have the same kinetic energy.

What were the original speeds of the two cars?