What is the kinetic energy of a 5 kg object moving at 3 m/s?

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Multiple Choice

What is the kinetic energy of a 5 kg object moving at 3 m/s?

Explanation:
Kinetic energy depends on motion and is given by KE = 1/2 m v^2. With mass 5 kg and speed 3 m/s, KE = 1/2 × 5 × (3)^2 = 0.5 × 5 × 9 = 22.5 joules. So the object has 22.5 J of kinetic energy. This matches the value shown, since the velocity is squared in the formula. Using the velocity without squaring or mixing up the mass would yield different numbers, which is why the correct result comes from applying the correct dependence on both mass and velocity.

Kinetic energy depends on motion and is given by KE = 1/2 m v^2. With mass 5 kg and speed 3 m/s, KE = 1/2 × 5 × (3)^2 = 0.5 × 5 × 9 = 22.5 joules. So the object has 22.5 J of kinetic energy. This matches the value shown, since the velocity is squared in the formula. Using the velocity without squaring or mixing up the mass would yield different numbers, which is why the correct result comes from applying the correct dependence on both mass and velocity.

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