1) Sometimes people say that water is removed from clothes in a spin dryer by centrifugal force throwing the water outward. What is wrong with this statement?
2) A bucket of water can be whirled in a vertical circle without the water spilling out, even at the top of a circle when the bucket is upside down. Explain.
plz help.... :)
2007-10-01 13:17:05 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Physics
1. Purists prefer not to call inertia (the tendency to keep moving in the same direction at the same speed) centrifugal force. Humor them; you can't win if you don't, even though in the rotating coordinate system of the spinning dryer basket, inertia acts exactly like a force directed away from the center. So you should say centripetal force (the force the basket exerts on its retained contents to keep it moving in a circle) keeps the clothes in the basket but the water is not retained by it and thus tends to continue in a direction tangential to the basket. Or words to that effect.
2. The bucket has to be whirled fast enough that the centripetal acceleration of the water equals or exceeds the gravitational acceleration.
2007-10-03 11:51:37 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋