In a washing machine, water is extracted from clothes by a rapidly spinning drum. Explain the physics behind this process.
Elleanor Mckenzie
Answered question
2020-11-08
Answer & Explanation
l1koV
Skilled2020-11-09Added 100 answers
Very basically, the washing machine has a certain radius R. Itspins around the with a certain velocity W. Now when the clothes are spinning they experience a centrifugal force which opposes the centripetal force and in this case is larger. So their clothes and the water are being spun around and there is force acting inwards and a force acting outwards.
Now the clothes don't go anywhere they are stuck to the side of the machine because the machine has walls and the wall as pushing back on the clothes with a normal force.
So they force acting on the clothes are a normal force from the wall (big force, same direction as green), the centripetal force (green, smaller force) and centrifugal force (red. larger than green).
Now the washing machine has holes in the sides so the waterdoesnt have the normal force acting on it the same as the clothes do. The centrifugal force will push the water out of the tiny holes.
So basically the Centrifugal force is great enough to separate water molecules from the clothes and push them radially outward through the tiny holes in the washing wall.
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