From an automatic gun a man fires 360 bullet per minute with a speed of 360 km/hour. If each weighs 20 g, the power of the gun is

Options

A. 600 W
B. 300 W
C. 150 W
D. 75 W

Answer

A

Explanation

Power of gum `=("Total K.E. of fired bullet")/("time")`
`=(n xx (1)/(2) mv^(2))/(t)= (360)/(60) xx (1)/(2) xx 2 xx 10^(-2) xx (100)^(2) = 600W`