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K=12mv2K = \dfrac{1}{2}mv^2K=21mv2
The kinetic energy KKK, in joules, of an object is modeled by the formula above, where mmm is the mass of the object, in kilograms, and vvv is its speed, in meters per second. Which of the following expresses vvv in terms of KKK and mmm?
v=2Kmv = \dfrac{2K}{m}v=m2K
v=2Kmv = \sqrt{\dfrac{2K}{m}}v=m2K
v=K2mv = \sqrt{\dfrac{K}{2m}}v=2mK
v=K2mv = \dfrac{K}{2m}v=2mK
