A bullet of mass \[20\,\,g\] is fired from a rifle of \[8\,\,kg\] with an initial velocity of\[100\,\,m\,\,{{s}^{-1}}\]. Find the final velocity of the recoil of the rifle.

A bullet of mass \[20\,\,g\] is fired from a rifle of \[8\,\,kg\] with

1.	A bullet of mass \[20\,\,g\] is fired from a rifle of \[8\,\,kg\] with an initial velocity of\[100\,\,m\,\,{{s}^{-1}}\]. Find the final velocity of the recoil of the rifle.
A.	\[-0.25\,\,m\,\,{{s}^{-1}}\]
B.	\[2.5\,\,m\,\,{{s}^{-1}}\]
C.	\[25\,\,m\,\,{{s}^{-1}}\]
D.	\[250\,\,m\,\,{{s}^{-1}}\]
Answer» B. \[2.5\,\,m\,\,{{s}^{-1}}\]

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A bullet of mass \[20\,\,g\] is fired from a rifle of \[8\,\,kg\] with an initial velocity of\[100\,\,m\,\,{{s}^{-1}}\]. Find the final velocity of the recoil of the rifle.

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