Question:
A bullet of mass 10 g leaves a rifle at an initial velocity of 1000 m/s and strikes the earth at the same level with a velocity of 500 m/s. The work done in joule overcoming the resistance of air will be
A bullet of mass 10 g leaves a rifle at an initial velocity of 1000 m/s and strikes the earth at the same level with a velocity of 500 m/s. The work done in joule overcoming the resistance of air will be
Updated On: May 17, 2024
- 375
- 3750
- 5000
- 500
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The Correct Option is B
Solution and Explanation
Work done = change in kinetic energy of the body
$ \, \, W=\frac{1}{2} \times \, 0.01[(1000)^2-(500)^2]=3750 \,joule.$
$ \, \, W=\frac{1}{2} \times \, 0.01[(1000)^2-(500)^2]=3750 \,joule.$
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