A block of mass "5kg" is placed on a wedge having inclination of `37^(@)` with the horizontal. Coefficient of friction between block and wedge is 0.8. Then select the correct statement.
A block of mass "5kg" is placed on a wedge having inclination of `37^(@)` with the horizontal. Coefficient of friction between block and wedge is 0.8. Then select the correct statement.
A
Friction force between block and the wedge is 32 N.
B
Friction force between block and the wedge is 30N.
C
Contact force between block and wedge is 80N.
D
Contact force between bock and wedge is 40N.
Text Solution
Verified by Experts
The correct Answer is:
B
`f_("max")=mumg cos theta=8xx5xx10xx(4)/(5)=32`
as `f_("max")ltmg sin theta`
friction `=mg sin theta-xx10xx(3)/(5)=30` Newton
and `N=mg cos theta=40N`
`rArr "contanct force"=sqrt((30)^(2)+(40)^(2))=50N`
as `f_("max")ltmg sin theta`
friction `=mg sin theta-xx10xx(3)/(5)=30` Newton
and `N=mg cos theta=40N`
`rArr "contanct force"=sqrt((30)^(2)+(40)^(2))=50N`
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