A) 640 J
B) 320 J
C) 480 J
D) 160 J
Answer: B
Explanation: Use kinetic energy = ½mv² for the stated idealized conditions. Substitution gives ½ × 10 × 8² = 320 J.
A) 640 J
B) 320 J
C) 480 J
D) 160 J
Answer: B
Explanation: Use kinetic energy = ½mv² for the stated idealized conditions. Substitution gives ½ × 10 × 8² = 320 J.
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