Question

Seven identical geese are flying south together at constant speed. A hunter shoots one of them, which immediately dies and falls to the ground. The other six continue flying south at the original speed. After the one goose has hit the ground, the center of mass of all seven geese

• A. Continues south at the original speed, but is now located some distance behind the flying geese.
• B. Continues south, but at $\frac{6}{7}$ the original speed.
• C. Continues south, but at $\frac{1}{7}$ the original speed.
• D. Stops with the dead goose.

Answer 1

The correct option is B Continues south, but at $\frac{6}{7}$ the original speed.

Initially, velocity of com $=\frac{7mv}{7m}=v$ after the shot.
No. of geese flying = 6 at velocity v.
Dead = 1, velocity = 0
Com. $=\frac{m.0+6m.u}{7m}$
$=\frac{6V}{7}$
Hence: (B) Option