A 1,500-kg car accelerates from rest to 20 m/s. What is its change in kinetic energy?
A30,000 J
B150,000 J
C300,000 J
D600,000 J
Explanation
📌 ΔKE = ½mv² − 0 = ½(1,500)(20)² = 750 × 400 = 300,000 J. Distractor A: mv only; B: forgot ½ and squared incorrectly; D: forgot ½.