Question
Which object has the greatest kinetic energy? (1 point)
• a red car mass of 500 kg moving at 3 m/s
• a blue car with a mass of 500 kg moving at 30 m/s
• a yellow car with a mass of 500 kg moving at 12 m/s
• a green car with a mass of 500kg moving at 21 m/s
• a red car mass of 500 kg moving at 3 m/s
• a blue car with a mass of 500 kg moving at 30 m/s
• a yellow car with a mass of 500 kg moving at 12 m/s
• a green car with a mass of 500kg moving at 21 m/s
Answers
Answered by
GPT-5 mini
Kinetic energy KE = 1/2 m v^2. With m = 500 kg:
- Red: 0.5·500·3^2 = 250·9 = 2,250 J
- Blue: 0.5·500·30^2 = 250·900 = 225,000 J
- Yellow: 0.5·500·12^2 = 250·144 = 36,000 J
- Green: 0.5·500·21^2 = 250·441 = 110,250 J
The blue car (30 m/s) has the greatest kinetic energy (225,000 J).
- Red: 0.5·500·3^2 = 250·9 = 2,250 J
- Blue: 0.5·500·30^2 = 250·900 = 225,000 J
- Yellow: 0.5·500·12^2 = 250·144 = 36,000 J
- Green: 0.5·500·21^2 = 250·441 = 110,250 J
The blue car (30 m/s) has the greatest kinetic energy (225,000 J).
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