Determine the kinetic energy of body of mass \( 4kg \) moving at \( 6m/s \).
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Correct Answer: Option A
Explanation:
Kinetic energy: \( KE = \dfrac12 mv^2 \) \( KE = \dfrac12 \times 4 \times 6^2 \) \( KE = 2 \times 36 \) \( KE = 72J \) Therefore, the kinetic energy is \( 72J \).
Kinetic energy: \( KE = \dfrac12 mv^2 \) \( KE = \dfrac12 \times 4 \times 6^2 \) \( KE = 2 \times 36 \) \( KE = 72J \) Therefore, the kinetic energy is \( 72J \).