<pl-question-panel>
<p>
Suppose the box $A$ is in equilibrium (at rest) in the position illustrated below, when a force $F$ is applied at the cable.
Box $A$ has mass $M_A = {{params.ma}}$ kg. Assume gravity equals to $10 \rm m / s^2$. Assume frictionless pulley.
Determine the force in the cable required for this equilibrium configuration.
</p>
<pl-drawing gradable="false" grid-size="20" width="500" height="320">
<pl-drawing-initial>
<pl-rectangle x1="280" y1="220" width="340" height="200" color="orange1"></pl-rectangle>
<pl-pulley x1="80" y1="80" x2="200" y2="50" x3="50" y3="200" radius="30" color="gray1"></pl-pulley>
<pl-rod x1="80" y1="80" x2="120" y2="130"></pl-rod>
<pl-rectangle x1="50" y1="230" width="40" height="60" color="green1"></pl-rectangle>
<pl-point x1="50" y1="230"></pl-point>
<pl-vector x1="200" y1="50"> </pl-vector>
</pl-drawing-initial>
</pl-drawing>
</pl-question-panel>
<pl-number-input answers-name="F" label="Cable force $=$" suffix="N" display="block"></pl-number-input>