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CBSE Class 9 Answered

Calculate the power output of a gun which fires 30 bullets of 100g each with a velocity of 500m/s in 10s.
Asked by aahnik.mohanty | 19 Dec, 2017, 09:04: PM
answered-by-expert Expert Answer
power = rate of workdone = workdone / time;
 
workdone by the gun = sum of kinetic energies of 30 bullets = 30×(1/2)×100 ×10-3 × 500 ×500 = 375 × 103 Joules
 
power = 375 × 103 / 10 = 375 ×102 Watts
Answered by | 20 Dec, 2017, 06:55: AM
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