Assertion : Static friction is a self-adjusting force upto its limit `mu_(s)N "where" mu_(s)` is the coefficient of static friction.
Reason: One can use the equation `f_(s)=mu_(s)N` only when the maximum value of static friction comes into play
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true and reason is the not correct explanation of assertion.
C. If assertion is true but reason is false
D. If both assertion and reason are false.
