A riffle shoots a bullet of 60g with a velocity of 50m/s.the velocity of recoil of refil us 2 the mass of rifle is
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m1u1+m2u2=m1v1 +m2v2
0.060*0+m2*0=0.060*50+2*m2
0=300+2*m2
-300/2=m2
m2=-150
don't consider negative sign
0.060*0+m2*0=0.060*50+2*m2
0=300+2*m2
-300/2=m2
m2=-150
don't consider negative sign
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