A gun fires a shell of mass `1.5kg` with a velocity of `150m//s` and recoils with a velocity of `2.5m//s`. Calculate the mass of gun?

Explanation

Here, `m_(1)= 1.5kg, v_(1)= 150m//s`
`m_(2)=? V_(2)= -2.5m//s`
As `m_(1)v_(1)+m_(2)v_(2)=0 m_(2)= (-m_(1)v_(1))/(v_(2))= (-1.5xx150)/(-2.5)= 90 kg`