Question

A bullet of mass is fired with a velocity of hundred meter per seconds. if gun is 10 kg what would be the recoil velocity of gun.??
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Answer 1

Answer:

The recoil velocity of gun weighing 10kg or 10000gram is due to opposite action due to firing bullet of 10gram with velocity of 300 m/s can be calculated as below :

The kinetic energy imparted by firing is 1/2 mvv where m is massof bullet weighing 10 gram and v the bullet velocity as 300m/s =

0.5*10*300*300 gram*m*m/(s*s) or 450000 gram*m*m/(s*s)

This is the opposite force on gun to kick backwards with velocity v m/s to generate same kinetic energy .

So , 0.5*10000*v*v = 450000 or

v *v = 450000/5000 = 90 or v = root 90= 3*root 10 m/s