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A simple truss is shown in the figure below. The 3-member truss is supported by a pin at joint A and a roller at joint C.

1. A simple truss is shown in the figure below. The 3-member truss is supported by a pin at joint A and a roller at joint C. There is a load P (in Newtons) being applied at joint B in the positive horizontal direction. The following equations describe the reaction forces at joints A and C as well as the member forces (FAB, FAC, FBC):



Write a MatLab program that does the following:
• Prompts the user to input a positive value of P
• Determines if the member forces are in tension or compression (note that a negative number denotes compression and a position number denotes tension)
• Calculates and displays the reaction and member forces
• Asks the user if they would like to continue and enter a new value
• Quits the program if the user answers no

The output should look like the following:

For the input value of 500N
Ax = 500 N (to the left)
Ay = 500 N (downward)
Cy = 500 N (up)
Fbc = 707.1 N (Compression)
Fab = 500 N (Tension)
Fac = 500 N (Tension)
Would you like to run the calculation again with a different input value?

This question was asked on May 28, 2010.

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