TS EAMCET · Physics · Work Power Energy
The machine gun fires 240 bullets per minute. If the mass of each bullet is \(10 \mathrm{~g}\) and the velocity of the bullets is \(600 \mathrm{~ms}^{-1}\), the power (in kW) of the gun is
- A 43200
- B 432
- C 72
- D 7.2
Answer & Solution
Correct Answer
(D) 7.2
Step-by-step Solution
Detailed explanation
Work done by the gun \(=\) Total kinetic energy of the bullets \(\begin{aligned} & =n \frac{1}{2} m v^2 \\ & =240 \times \frac{1}{2} \times 10 \times 10^{-3}(600)^2 \\ & =120 \times 10 \times 10^{-3} \times 600 \times 600 \end{aligned}\)…
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