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What is the angle of friction, if the co...

What is the angle of friction, if the coefficient of friction between two surfaces is 0.25 ?

A

`theta=sin^(-1)(1/(sqrt17))`

B

`theta=cos^(-1)(1/(sqrt17))`

C

`theta=tan^(-1)(0.5)`

D

`theta=cot^(-1)(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
If `theta` is the angle of friction=`muR=muMg`
`:." "tan theta=0.25=1/4`
`:." "sintheta=1/(sqrt17)" ":." "theta=sin^(-1)(1/(sqrt17))`
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