Substitute the given values into the kinetic energy formula: $100 \, \text{J} = \frac{1}{2} \times (2 \, \text{kg}) \times v^2$. This simplifies to $100 = 1 \times v^2$, so $v^2 = 100$. Taking the square root of both sides gives $v = 10 \, \text{m/s}$ (since speed is a magnitude and must be non-negative).
An object of mass 2000 g possesses 100 J kinetic energy. The object must be moving with a speed of
Asked in UPSC NDA 2 2021 · Topic: Mechanics (Work, Energy, and Power)
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