from a rifle of mass 4kg a bullet of mass 50g is fired with an initial velocity of 35m/s. Calculate the initial recoil velocity of the Rifle.
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Explanation:
let mass of rifle be M1=4 kg
mass of bullet be M2=0.05 kg
velocity of bullet = V2=35m/s^2
velocity of of rifle=V1=?
total momentum of bullet and pistol before firing
=4*0 + 0.05*0
=0
total momentum of bullet and pistol after firing
=4*v1 + 0.05*35
=4v1 + 1.75
according to law of conservation of mass
total momentum of bullet and pistol before firing equal to to total momentum of bullet and pistol after firing
0=4v1 + 1.75
-1.75=4v1
-1.75/4=v1
v1=0.44
required velocity of rifle equal to 0.44 metre per second
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