question_answer

What is the recoil velocity of a pistol, if a bullet of the mass of 20 g is fired horizontally with a \[150\text{ }m{{s}^{-1}}\]from that pistol, and the mass of the pistol is 2 kg?

A)  \[-1.5\,m{{s}^{-1}}\]

B)  \[1.0\,m{{s}^{-1}}\]

C)  \[3\,m{{s}^{-1}}\]      

D)  \[1.5\,m{{s}^{-1}}\]

E)  None of these