While sieving grains, small pieces fall down. Which force pulls them down?
A
Coulomb force
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B
Gravitational force
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C
Nuclear force
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D
Electrostatic force
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Solution
The correct option is B Gravitational force This is due to Forceof gravity that the sieving Grains fall down. This is due the attraction of the earth that it pulls small grains, while sieving.