Consider the rod shown in $($Figure $1).$ The contact surface at B

is smooth, whereas the coefficient of static friction between the rod and the wall at A

is $\backslash$mu s

$=0\mathrm{.}27.$

Figure$1$ of $1$

A straight rod $\text{'}$A$\text{'}$ B is in contact with a horizontal floor at its left end B and with a vertical wall at its right end $\text{'}$A$\text{'}.$ Point B is $4$ meters to the left of the wall and point $\text{'}$A$\text{'}$ is $3$ meters above the floor. A force P is applied to end B and is directed horizontally rightward.

Part A

Determine the minimum force P

to prevent the $39-$kg

rod AB

from sliding.

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

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P

$=$

nothing