Complete Question
The diagram for this question is shown on the first uploaded image
Answer:
The value is [tex]F_j = 550\ N[/tex]
Explanation:
From the question we are told that
The length of the stretcher is [tex]d = 2.0 \ m[/tex]
The weight of the stretcher is [tex]W = 100 \ N[/tex]
The weight for Wayne is [tex]W_w = 800 \ N[/tex]
The distance of center of gravity for Wayne from Chris is [tex]c_w = 75 cm = 0.75 \ m[/tex]
Generally taking moment about the first end where Chris is
[tex]F_j * d[/tex] => upward moment
Here [tex]F_j[/tex] is the force applied by Jamie
Generally taking moment about the second end where Jamie is
[tex]W * ( \frac{d}{2} ) + W_w * (d - c_w)[/tex] => downward moment
Generally at equilibrium , the upward moment is equal to the downward moment
[tex]F_j * d = W * ( \frac{d}{2} ) + W_w * (d - c_w)[/tex]
=> [tex]F_j * 2 = 100 * ( \frac{ 2}{2} ) + 800 * (2 - 0.75)[/tex]
=> [tex]F_j = 550\ N[/tex]
