Center of MassHardBloom L3
Question
Seven identical birds are flying south together at constant velocity. A hunter shoots one of them, which immediately dies and falls to the ground. The other six continue flying south at the original velocity. After the one bird has hit the ground, the centre of mass of all seven birds
Options
A.continues south at the original speed, but is now located some distance behind the flying birds
B.continues south, but at 6/7 the original velocity
C.continues south, but at 1/7 the original velocity
D.stops with the dead bird
Solution
Sol. $(v_{cm})_{f} = \frac{m.O + ({m.v}) \times 6}{7m} = \frac{6}{7}v$
$(v_{cm})_{i} = \frac{({mv}) \times 7}{7m} = v$
∴ $(v_{cm})_{f} = \frac{6}{7}(v_{cm})_{i}$
Create a free account to view solution
View Solution FreeMore Center of Mass Questions
A wagon filled with sand has a hole so that sand leaks through the bottom at a constant rate λ. An external force a...Two wires of same metal have the same length but their cross sections are Anthe ratio 3 : 1. They are joined in series. ...Two perfectly elastic balls of same mass m are moving with velocities u1 and u2. They collide elastically n times. The k...A disc is placed on the surface of a pond which has refractive index 5/3. A source of light is placed 4m below the surfa...Three-man A, B & C of mass 40 kg, 50 kg & 60 kg are standing on a plank of mass 90 kg, which is kept on a smooth...