Question

A bullet of mass $A$ and velocity $B$ is fired into a block of wood of mass $C$. If loss of any mass and friction be neglected, the velocity of the system must be

• A. $\frac{AB}{A+C}$
• B. $\frac{A+C}{B+C}$
• C. $\frac{AC}{B+C}$
• D. $\frac{A+B}{AC}$

Answer 1

The correct option is A $\frac{AB}{A+C}$

initial momentum = AB

final momentum = v(A+C) (where V is the final velocity of the system)

$v=\frac{AB}{A+C}$