(Solved): The industrial robot is held in the stationary position shown. Draw the shear diagram of the arm AB ...

The industrial robot is held in the stationary position shown. Draw the shear diagram of the arm $ABC$ if it is pin connected at $A$ and connected to a hydraulic cylinder (two-force member) $BD$. Assume the arm and grip have a uniform weight of $1.5\mathrm{lb}/\mathrm{in}$. and support the load of $40\mathrm{lb}$ at $C$. Click on "add discontinuity" to add discontinuity lines. Then click on "add segment" button to add functions between the lines. Note - Make sure you place only one vertical line at places that require a vertical line. If you inadvertently place two vertical lines at the same place, it will appear visually correct because the lines overlap, but the system will mark it wrong. Draw the moment diagram of the arm $ABC$. Click on "add discontinuity" to add discontinuity lines. Then click on "add segment" button to add functions between the lines. NOTE - The curve you choose from the drop-down is only a pictorial representation of a real quadratic/cubic curve. The equation of this curve is not mathematically equivalent to the correct answer. Consequently, slopes at discontinuities and intercepts with the x-axis (if any) are not accurate. Note - Make sure you place only one vertical line at places that require a vertical line. If you inadvertently place two vertical lines at the same place, it will appear visually correct because the lines overlap, but the system will mark it wrong.