Using the method of Sec. 4.7, solve Prob. 4.17c. Problem 4.17: Determine the reactions at A and B when (a) a = 0,
(b) a =90°,
(c) a =30°.

Question

Using the method of Sec. 4.7, solve Prob. 4.17c. Problem 4.17: Determine the reactions at A and B when (a) a = 0,
(b) a =90°, 
(c) a =30°.

David · Accepted Answer

Apply the force balance equations  
       ( )   ( ) 
       ( )       ( ) 
Apply the moment balance about A 
    ( )          ( )                 ( ) 
a) 
When      
Equation (3) becomes  
    ( )          ( )
From (2)
From (1)
b) 
When       
Equation (3) becomes  
    (  )          (  )
From (2)
From (1)
c) When       
Equation (3) becomes  
    (  )          (  )
From (2)  
       (  )
From (1)  
       (  )            
Note:
       
√

Using the method of Sec. 4.7, solve Prob. 4.17c. Problem 4.17: Determine the reactions at A and B when (a) a = 0, (b) a =90°, (c) a =30°.

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