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प्रश्न
A lead pellet of mass 10 g leaves an air gun with a velocity of 40 ms−1. What is the magnitude of potential energy stored by its spring?
संख्यात्मक
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उत्तर
The spring's potential energy changes into the pellet's kinetic energy.
Convert the mass: 10 g = 0.01 kg
\[ \text{Kinetic energy} = \frac{1}{2}\, mv^{2} \]
\[= \frac{1}{2} \times 0.01 \times 40^{2} \]
= 8 J
Therefore, the potential energy stored by the spring is 8 J.
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