COMEDK · Physics · 6. Work Power Energy
The power of a gun which fires 120 bullet per minute with a velocity \(120 \mathrm{~ms}^{-1}\) is : (given the mass of each bullet is \(100 \mathrm{~g}\))
- A 14.4 kW
- B 86400 W
- C 1.44 kW
- D 1220 W
Answer & Solution
Correct Answer
(C) 1.44 kW
Step-by-step Solution
Detailed explanation
The number of bullets fired per second is \(n = \dfrac{120}{60} = 2\) bullets per second. The mass of each bullet is \(m = 100 \text{ g} = 0.1 \text{ kg}\). The velocity of each bullet is \(v = 120 \text{ ms}^{-1}\). The kinetic energy of one bullet is…
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