Review

Learning Goal:

To develop the ability to break a frame or machine down into subsystems and to determine the forces developed at internal pin connections.

Frames and machines are systems of pin$-$connected, multiforce members. Frames are designed to support loads, whereas machines are designed to transmit or alter the effects of loads. For a frame or machine to be in equilibrium, each member of the frame or machine system must be in equilibrium. Free$-$body diagrams of the overall system, as well as individual members, groups of

Figure

$4$ of $4$

Previous Answers

Correct

Note that the internal reactions at $B$ are not included in the free$-$body diagram of the subsystem ABC.

Part D $-$ A tractor shovel

The tractor shovel shown $($Figure $4)$ carries a $535$ kg load that has its center of mass at $H.$ The shovel's dimensions are: $a=51\mathrm{.}0mm,b=204mm,c=306mm,d=102mm,$ and $e=357mm.$ Find the reaction force at $E.$ Assume that the positive direction of the $x$ and $y$ axes is to the right and upward, respectively.

Enter the Cartesian components of the reaction force at $E$ separated by a comma. Express your answers in newtons to three significant figures.

View Available Hint$($s$)$

$E_x,E_y=$

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