An 82 kg jogger has 810 J of kinetic energy. What is the jogger’s velocity?

Use the kinetic energy formula, KE = ½mv², and solve for velocity: v = √(2KE/m). Substituting the values gives v = √(2 × 810 J ÷ 82 kg) ≈ √19.76 ≈ 4.4 m/s. The jogger’s velocity is 4.4 m/s, choice A.

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