1.

A box is placed on three different surfaces "a marble floor, a cardboard sheet, and a sandpaper. The minimum forces required to simply move the box   on   the   surfaces   are \[{{F}_{m}},{{F}_{c}},\] and \[{{F}_{s}}\] respectively. The three forces can be arranged in the decreasing order as

A.  \[{{F}_{c}}<{{F}_{m}}<{{F}_{s}}\]            
B.  \[{{F}_{c}}<{{F}_{s}}<{{F}_{m}}\]
C.  \[{{F}_{m}}<{{F}_{c}}<{{F}_{s}}\]            
D.  \[{{F}_{s}}<{{F}_{c}}<{{F}_{s}}\]
Answer» D.  \[{{F}_{s}}<{{F}_{c}}<{{F}_{s}}\]


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