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A block pressed against the vertical wal...

A block pressed against the vertical wall is in equilibrium. The minimum coefficient of friction is:

A

0.4

B

0.2

C

0.5

D

none of these me

Text Solution

Verified by Experts


(c) Here net driving force
`=mg-mg/2=mg/2` doenward
Hance friction will act upward and its magnitude should be `f=mg/2`
If the block .m. is statiomary the friction between m and the wall should be static.
`f lef_(lim)`
`mg/2lemu.Nimpliesmg/2lemu(mg)impliesmu=1/2`
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