Question

If a raw egg and a boiled egg are spinned together with same angular velocity on the horizontal surface then which one will stops first?

• A. boiled egg
• B. raw egg
• C. Both egg will stop simultaneously
• D. Cannot be ascertained

Answer 1

The correct option is B raw egg

In the rotation of hard boiled egg, friction can stop its movement. The time to stop will depend on initial angular velocity and torque due to frictional force. In case of the raw egg. It is not a rigid body unlike the former because fluid start rotating relative to the shell. Torque due to frictional force and loss of energy due to viscous drag stop its motion. In addition to friction we have a viscous drag in latter case, so raw egg is expected to stop first.