Determine the smallest horizontal force $P$ needed to cause motion.

The dresser has a weight of $50$ lb and is pushed along the floor as shown in

$($Figure $1).$ Assume $h=3\mathrm{.}5ft.$ The coefficient of static friction at A and $B$ is

${}_s=0\mathrm{.}32$ and the coefficient of kinetic friction is ${}_k=0\mathrm{.}2.$

Figure

If force $P$ is increased slightly, determine the acceleration of the dresser.

Express your answer in feet per squared second to three significant figures. Assume the positive direction is to the right.

$a=,|f\frac{t}{s^2}$

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Part C

Also, what are the normal reaction at A and $B$ when it begins to move?

Express your answers in pounds using three significant figures separated by a comma.

$N_A,N_B=$