Q. The washing machine works on the principle of which of the following?
Answer: Centrifugation
Notes: Washing machines work on the principle of centrifugation. They are based on medium sized centrifuges that put an object in rotation around a fixed axis, applying force perpendicular to the axis. It uses the sedimentation principle, where the centripetal acceleration separates substances of greater and lesser density. Besides, it also makes use of the centrifugal force generated in the gspin cycleh of washing machines that throws the water out through the little holes of perforated drum so that the washed clothes end up much drier.