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A $185-lb$ block is placed on a $35$ incline and released from rest. The coefficient of static friction between the block and the incline ${}_s$ is $0\mathrm{.}35.($a$)$ Determine the maximum and minimum values of the initial tension $T$ in the spring for which the block will not slip when released. $($b$)$ Calculate the friction force $F($positive if up the slope, negative if down$)$ on the block if $T=111lb.$

Assume $W=185lb,=35.$

Answers:

$($a$)T_{\text{m}\text{a}\text{x}}=$

$lb,T_{\text{m}\text{i}\text{n}}=$

Ib

$($b$)F=$ Ib