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MDCAT Physics QUESTION #4385
Question 1
A $0.5\ kg$ ball moving at $6\ m/s$ has kinetic energy:
  • $9\ J$✔️
  • $18\ J$
  • $6\ J$
  • $3\ J$
Correct Answer Explanation
$KE = \dfrac{1}{2}mv^2 = \dfrac{1}{2} \times 0.5 \times (6)^2 = \dfrac{1}{2} \times 0.5 \times 36 = 9\ J$.