Mohit measure minimum force required to pull wooden block to be F1,when it was placed on a wooden table.He repeated the experiment by placing the block on glass surface and on cardboard and measured forces to be F2 and F3 respectively.which one of these will be minimum and which will be maximum?why?

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Solution

F2 IS minimum and F1 is maximum
due to the reason
Roughness of wood is more than card board more than glass

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F2 IS minimum and F1 is maximum due to the reason Roughness of wood is more than card board more than glass

F2 IS minimum and F1 is maximum
due to the reason
Roughness of wood is more than card board more than glass