Calculate the kinetic energy of a 4 kg object moving at 10m/s a 4000 b 800J C 200J d 20 J

The formula for kinetic energy is KE = (1/2)mv², where m is mass and v is velocity.<br /><br />Here, m = 4 kg and v = 10 m/s.<br /><br />So, KE = (1/2) * 4 kg * (10 m/s)² = 2 * 100 = 200 Joules.<br /><br />Therefore, the correct answer is **C 200J**.<br />