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There's an old trick to dry lettuce that involves putting lettuce into a pillowcase and spinning it around one's

head in a horizontal circle. Remy has put a head of lettuce with a mass of 450 grams into a pillowcase 32 inches long and spins it around his head such that it moves in a circle at constant speed. Let's simplify the situation by treating the lettuce as a point mass and assuming the mass of the pillowcase and water is negligible.


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IMG_2538.jpg

Rotating in a horizontal circle
HY -
- LCoso = 4.
-) Radius of circle & = Lose.
Free body diagram :
Ny = NCOso
N
Ny = N. Sino
Fc

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