Question

A machine gun fires 240 bullets per minute with a velocity 80 m s-1. If the mass of each bullet is 0.04
kg, than calculate the power of the gun.
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Answer 1

Answer:-

P = 512W

Explanation:-

Given:-

• m = 0.04kg
• n = 240
• v = 80m/s
• t = 1 min = 60 sec

To Find:-

Power of the gun

Solution:-

$\bold{Power = \dfrac{work \: done}{time}}$

${\rightarrow} \: P = \dfrac{\dfrac{1}{2}nm{v}^{2}}{t}$

${\rightarrow} \: P = \dfrac{\dfrac{1}{2}\times 240 \times 0.04 \times {80}^{2}}{60}$

${\rightarrow} \: P = \dfrac{120 \times 0.04 \times 80 \times 80 }{60}$

${\rightarrow} \: \bold{P = 512W}$