Two blocks $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )$ shown in $($Figure $1)$ have a weight of $11$ lb and $4$ lb $,$ respectively. They are resting on the incline for which the coefficients of static friction are $\backslash (\backslash$mu$\_\{$A$\}=0\mathrm{.}17\backslash )$ and $\backslash (\backslash$mu$\_\{$B$\}=0\mathrm{.}27\backslash ).$ Determine the angle $\backslash (\backslash$theta $\backslash )$ which will cause motion of one of the blocks. What is the friction force under each of the blocks when this occurs? The spring has a stiffness of $\backslash ($ k$=2\backslash$mathrm$\{$lb$\}/\backslash$mathrm$\{$ft$\}\backslash )$ and is originally unstretched.

Determine the smallest angle $\backslash (\backslash$theta $\backslash )$ which will cause motion of one of the blocks.

Express your answer in degrees to three significant figures.

$\backslash [$

$\backslash$theta$=$

$\backslash ]$

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Part B

Determine is the friction force under the block $\backslash ($ A $\backslash )$ at this angle.

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

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Figure

Part C

Determine is the friction force under the block $\backslash ($ B $\backslash )$ at this angle.

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

$\backslash [$

F$\_\{$B$\}=$

$\backslash ]$