The crate in $($Eigure $1)$ has a center of gravity at $G.$Blocks $A,B$ and $C$ in $($Figure $1)$ have weights of $55N,$

$25N,$ and $20N,$ respectively.

Figure

Part A

Determine the smallest horizontal force $P$ that will cause impending motion. The coefficient of static friction between A and $B$ is

${}_s=0\mathrm{.}3,$ between $B$ and $C,{}_s^{\text{'}}=0\mathrm{.}4,$ and between block $C$ and the ground, ${}_s^{\text{'}\text{'}}=0\mathrm{.}35.$

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

$P=$

$1$ of $1$

Figure

Part A

Determine the maximum force $P$ that can be applied without causing movement of the $290-1b$ crate. The coefficient of static

friction at the floor is ${}_s=0\mathrm{.}37.$

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

$P=|$

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