Part $B-$ Members $BC$ and $BK$

Learning Goal:

The method of sections generally provides a straightforward way of determining forces in select truss members. To apply the method of sections, we pass an imaginary section through the truss that "cuts" the truss into two parts, each of which must be in equilibrium. Because there are only three equilibrium equations $,$ and $($:${\displaystyle \underset{?}{\overset{?}{}}}{M}_0=0\}$ that can be applied to each part of the truss, we want to "cut" through the truss at a location that passes through no more than three members with unknown forces. This cut must pass through the member$($s$)$ of interest. You also will need to select which part of the truss to use in your analysis, Although both parts will lead to the solution, one part is usually easler to solve. However, for the method of sections to work, it is often necessary to determine the support reactions first. Othenwise, you might have too many unknown forces after making the cut; which prevents further analvsis

Figure

$1$ of $1$

Determine $F_{BC}$ and $F_{BK},$ the forces in members $BC$ and $BK,$ using the method of sections. Assume for your calculations that each member is in tension, and include in your response the sign of each force that you obtain by applying this assumption.

Express your answers in newtons to three significant figures separated by a comma.

View Available Hint$($s$)$

Provious Answers

Part C $-$ Members $IJ$ and $DI$

Determine $F_{IJ}$ and $F_{DI},$ the forces in member $N$ and $DI,$ using the method of sections. Assume for your calculations that each member is in tension and include in your response the sign of each force that you obtain by applying this assumption.

Express your answers in newtons to three significant figures separated by a comma.

View Available Hint$($s$)$

$\sqrt[n]{}$

$A$

$$1$

vec

$?$

$F_{IJ},F_{DI}=$

N

PLEASE ANSWER PART C WITH EXPLANATION.

P$1=880$N; P$2=1290$N; a$=5\mathrm{.}6$m