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Kinetic energy varies jointly as the mass and the square of the velocity. A mass of 4 grams and velocity of 3 centimeters per second

Kinetic energy varies jointly as the mass and the square of the velocity. A mass of 4 grams and velocity of 3 centimeters per second has a kinetic energy of 18 ergs. Find the kinetic energy for a mass of 2 grams and velocity of 7 centimeters per second.

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