What is the kinetic energy of a 1500 kg car moving at 20 m/s?

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Multiple Choice

What is the kinetic energy of a 1500 kg car moving at 20 m/s?

Explanation:
The main idea is to use the kinetic energy formula: KE = 1/2 m v^2. Plug in the mass and speed: m = 1500 kg and v = 20 m/s gives v^2 = 400. So KE = 0.5 × 1500 × 400 = 750 × 400 = 300,000 joules. The car’s kinetic energy is 3.0 × 10^5 J. For context, other numbers would come from different speeds (for example, about 14.1 m/s gives 150,000 J, 10 m/s gives 75,000 J, and about 44.7 m/s gives 1,500,000 J).

The main idea is to use the kinetic energy formula: KE = 1/2 m v^2. Plug in the mass and speed: m = 1500 kg and v = 20 m/s gives v^2 = 400. So KE = 0.5 × 1500 × 400 = 750 × 400 = 300,000 joules. The car’s kinetic energy is 3.0 × 10^5 J. For context, other numbers would come from different speeds (for example, about 14.1 m/s gives 150,000 J, 10 m/s gives 75,000 J, and about 44.7 m/s gives 1,500,000 J).

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