What happens to the kinetic energy of an object if its velocity is tripled?
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The kinetic energy of an object with mass m and which has a speed of v is given by (1/2)*m*v^2. ... Similarly, if the speed of the object triples the kinetic energy becomes nine times the initial kinetic energy. If the speed of an object changes by a factor k, the change in the kinetic energy is of a factor k^2.
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