Two blocks $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )$ shown in $($Egure $1)$ have a weight of $10$ lb and $5$ 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 stiffess 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 fligures.

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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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Correct answer is shown. Your answer $1\mathrm{.}66$ lb was either rounded differently or used a different number of significant figures than required for this part.

Part C

Deterrine 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.

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