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Question: The telescoping arm ABC is used to provide an elevated platform for construction workers. The workers and the platform together have a mass of 200 kg and have a combined center of gravity located directly above

Question: The telescoping arm ABC is used to provide an elevated platform for construction workers. The workers and the platform together have a mass of 200 kg and have a combined center of gravity located directly above C. For the position when θ= 20°. determine (a) the force exerted at B by the single hydraulic cylinder BD.(b) the force exerted on the supporting carriage at A.  

Answer:

 

 

Step 1 of 7

Given

The total mass of the workers and platform 

Angle 

Step 2 of 7

Free body diagram of the boom

Step 3 of 7

From the geometry of figure

Step 4 of 7

Taking moment about the point A

Step 5 of 7

Taking the condition of equilibrium,

Step 6 of 7

Taking the condition of equilibrium,

Step 7 of 7

The resultant acting at the point A is determined by using

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