alleryA 2 kg cricket ball moving at 30 m/s has a kinetic energy of:
A60 J, computed as mass × velocity
B30 J, half of mass × velocity
C900 J, computed as ½ × 2 × 30²
D1800 J, computed as mass × velocity²
Answer & Solution
Correct answer: C. 900 J, computed as ½ × 2 × 30²
KE = ½mv² = ½ × 2 × 30² = ½ × 2 × 900 = 900 J. Doubling speed quadruples KE.
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