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Equilibrium of current forces

LATEBLOOMER

New member
Aug 7, 2013
21
I wonder if there's a physics person here who could help me solve this problem.

the loads applied to the truss shown in the figure cause reactions shown at A & D. A free body diagram of hinge A forms concurrent force system shown enclosed at A. Determine the magnitude of forces P & F directed respectively along bars AB & AE that maintain equilibrium of this system.
 

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Klaas van Aarsen

MHB Seeker
Staff member
Mar 5, 2012
8,779
I wonder if there's a physics person here who could help me solve this problem.

the loads applied to the truss shown in the figure cause reactions shown at A & D. A free body diagram of hinge A forms concurrent force system shown enclosed at A. Determine the magnitude of forces P & F directed respectively along bars AB & AE that maintain equilibrium of this system.
Hi LATEBLOOMER! :)

First step is to find all external forces based on the conditions for equilibrium ($\sum F_x = 0, \sum F_y = 0, \sum M_A = 0$).

Suppose the external force at A on the truss has 2 components $A_x$ and $A_y$, and similarly at D we have $D_x$ and $D_y$. Can you find these forces?
I suggest you start with calculating the moments of all external forces with respect to A.
 

Ackbach

Indicium Physicus
Staff member
Jan 26, 2012
4,192