Which object has the greatest kinetic energy?
1. A red car mass of 509 kg moving at 3 m/s
2. A blue car with a mass of 500 kg moving at 30 m/s
3. A green car with a mass of 500kg moving at 21 m/s
4. A yellow car with a mass of 50p kg moving at 12 m/s
To calculate the kinetic energy of an object, we can use the formula:
Kinetic Energy = (1/2) * mass * velocity^2
1. For the red car:
Kinetic Energy = (1/2) * 509 kg * (3 m/s)^2 = 2,291.5 joules
2. For the blue car:
Kinetic Energy = (1/2) * 500 kg * (30 m/s)^2 = 225,000 joules
3. For the green car:
Kinetic Energy = (1/2) * 500 kg * (21 m/s)^2 = 220,500 joules
4. For the yellow car:
Kinetic Energy = (1/2) * 50 kg * (12 m/s)^2 = 3,600 joules
Based on these calculations, the blue car (option 2) has the greatest kinetic energy with a value of 225,000 joules.