A car of mass 1200 kg moves at 20 m/s. What is its kinetic energy?

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Multiple Choice

A car of mass 1200 kg moves at 20 m/s. What is its kinetic energy?

Kinetic energy is the energy of motion, and it depends on both mass and speed. It’s found with the formula KE = 1/2 m v^2. Here, m = 1200 kg and v = 20 m/s. So v^2 = 400. Then KE = 0.5 × 1200 × 400 = 600 × 400 = 240,000 J, which is 240 kJ. So the car’s kinetic energy is 240 kJ.

Kinetic energy is the energy of motion, and it depends on both mass and speed. It’s found with the formula KE = 1/2 m v^2.

Here, m = 1200 kg and v = 20 m/s. So v^2 = 400. Then KE = 0.5 × 1200 × 400 = 600 × 400 = 240,000 J, which is 240 kJ.

So the car’s kinetic energy is 240 kJ.

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