Two blocks A and $B$ shown in $($Figure $1)$ have a weight of $11$ lb and $5$ lb $,$ respectively. They are resting on the incline for which the coefficients of static friction are ${}_A=0\mathrm{.}17$ and ${}_B=0\mathrm{.}27.$ Determine the incline angle $$ for which both blocks begin to slide. Also find the required stretch or compression in the connecting spring for this to occur. The spring has a stiffness of $k=2\mathrm{.}2l\frac{b}{f}t.$

Determine the incline angle $$ for which both blocks begin to slide.

Express your answer to three significant figures and include the appropriate units.

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Part B

Determine the change of the length of the spring. Assume this change to be positive if the spring is stretched and negative if the spring is compressed.

Express your answer to three significant figures and include the appropriate units.

$x=$ Value

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