Answer the question the system is
1) 2) 100% 3) 4)
A machine gun fires 420 bullets per minute.
The velocity of each bullet is 300ms-1 and the
mass of each bullet is lgm. The power of the
machine gun is
1) 315W
3) 630W
2) 315000W
4) 3150W
A 1 kg mass at rest is subjected to an
