A 2.0-kg object moves at a speed of 6.0 m/s. What is its kinetic energy?
Explanation
📌 KE = ½mv² = ½ × 2.0 × 6.0² = ½ × 2.0 × 36 = 36 J. Distractor A used mv (skipped both ½ and square); B used ½mv (skipped square); D used mv² (forgot the ½). The ½ and the v² are the two ingredients most commonly missed on KE problems.