The $20-kg$ block A rests on the $55-kg$ plate $B$ as shown in $($Figure $1).$

Figure

$1$ of $1$

Part A

Neglecting the mass of the rope and pulley, and using the coefficients of kinetic friction indicated, determine the time needed for block $A$ to slide $0\mathrm{.}5$ m on the plate when the system is released from rest.

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

$t=$

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