Question:
A body of mass 2 kg is moving with a velocity of 3 m/s. What is its kinetic energy?
A body of mass 2 kg is moving with a velocity of 3 m/s. What is its kinetic energy?
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Kinetic energy depends on the square of velocity, so small changes in speed have a large impact.
Updated On: Sep 16, 2025
- 6 J
- 9 J
- 12 J
- 18 J
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The Correct Option is B
Solution and Explanation
Kinetic energy is given by:
\[
KE = \frac{1}{2} m v^2
\]
where \(m = 2 \, \text{kg}\), \(v = 3 \, \text{m/s}\).
Calculate: \[ KE = \frac{1}{2} \cdot 2 \cdot 3^2 = 1 \cdot 9 = 9 \, \text{J} \] Thus, option (2) is correct.
Calculate: \[ KE = \frac{1}{2} \cdot 2 \cdot 3^2 = 1 \cdot 9 = 9 \, \text{J} \] Thus, option (2) is correct.
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