Q10. . A machine gun fires 240 bullets per minute with certain velocity. If the mass of the each bullets is ten to the power minus two kg and the power of the gun is 7.2 k.W find the velocity which each bullet is fired.

Asked by sbidipak | 5th Jul, 2017, 07:56: PM

Expert Answer:

begin mathsize 12px style Mass space of space each space bullet space left parenthesis straight m right parenthesis space equals space 10 to the power of negative 2 end exponent space kg space
Power space equals space 7.2 space kW space equals space 7.2 space cross times 10 cubed space space straight W space space
Number space of space bullets space per space sec space equals space straight n over straight t space equals space 240 over 60
We space use space the space formula space
straight P space equals space 1 half nmv squared over straight t
rightwards arrow space straight v squared space equals space fraction numerator 2 pt over denominator nm end fraction space equals space fraction numerator 2 space cross times space 7.2 space cross times 10 cubed space cross times space 60 space space over denominator 240 space cross times space 10 to the power of negative 2 end exponent end fraction
rightwards arrow space straight v space equals space 600 space straight m divided by straight s end style

Answered by Yashvanti Jain | 6th Jul, 2017, 12:17: PM