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2015-10-18T13:18:24+05:30

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mass1=0.02kg
u1=0m/s
v1=150m/s
mass2=2kg
u2=0m/s
v2=v.
∴by the law of conservation of momentum,
m1u1+m2u2=m1v1+m2v2
0.02*0+2*0=0.02*150+2*v
⇒0+0=3+2v
⇒3=2v
⇒3/2=v
⇒1.5=v
∴recoil velocity = 1.5 m/s
 i hope that this will help u..................






2 3 2
what is the mistake hare TPS
u1=0, v1=150...just interchange the values you have written and then solve
And take the mass of bullet as 20g please, not 20kg. It is written 20kg in question, but take it as 20g or 0.02kg
There can't be a 20kg bullet for a 2kg gun