Answer
The magnitude of the force between the bony structures at the elbow contact point is $~~560~N$
Work Step by Step
In part (a), we found that the magnitude of the upward force of the biceps muscle on the lower arm is $~~650~N$
To find the magnitude of the force $F$ between the bony structures at the elbow contact point, we can consider the vertical forces:
$F_{net,y} = 0$
$F+650~N-(1.8~kg)(9.8~m/s^2)-(7.2~kg)(9.8~m/s^2) = 0$
$F = (1.8~kg)(9.8~m/s^2)+(7.2~kg)(9.8~m/s^2)-650~N$
$F = -560~N$
The magnitude of the force between the bony structures at the elbow contact point is $~~560~N$.
