Answer:
[tex] \: \: \underline{ \boxed{ \large{\sf\mu_s = 0.1}}}[/tex]
Explanation:
The formula to calculate the coefficient of static friction is given by :
[tex] \sf \: \: \mu_s = \dfrac{F}{N} [/tex]
where :
Here we have :
Static friction = 45 N
Normal friction = 450 N
Substitute the required values in the above formula
[tex] \sf\mu_s = \dfrac{45}{450} [/tex]
[tex] \sf\mu_s = 0.1[/tex]